Methods for managing interruptions with multiple deactivated scells

ABSTRACT

A wireless device and a method for a wireless device served by a first network node on a primary cell (PCell) is provided. The wireless device is capable of using at least two secondary serving cells (SCells). A first request to perform a measurement on at least one cell on a first secondary component carrier (SCC) with a deactivated first SCell using at least a first measurement cycle is received. A second request to perform a measurement on at least one cell on a second SCC with a deactivated second SCell using at least a second measurement cycle is received. An effective serving cell interruption probability (Peff) of missed at least one of Acknowledgement and Negative-Acknowledgement signaling in an uplink direction is determined based on at least the first measurement cycle and the second measurement cycle. A serving cell interruption probability is ensured to not exceed the determined Peff.

TECHNICAL FIELD

The present invention relates to carrier aggregation operation ofwireless devices, and in particular to managing serving cell performancewhen performing measurements on at least one secondary component carrier(SCC).

BACKGROUND

The growing increase in wireless communication connectivity and usagehas continued to put pressure on service providers to expand coverageareas and increase data rates. In Long Term Evolution (LTE) Advanced,one way to increase data rates is to implement a multicarrier or carrieraggregation (CA) scheme. In CA operation, the wireless device is able toreceive and/or transmit data to more than one serving cell, therebyincreasing overall transmission/reception bandwidth. In other words, aCA capable wireless device may be configured to operate with more thanone serving cells. The carrier of each serving cell is generally calledas a component carrier (CC). The component carrier (CC) means anindividual carrier in a multi-carrier system.

The term carrier aggregation (CA) is also called (e.g. interchangeablycalled) “multi-carrier system”, “multi-cell operation”, “multi-carrieroperation”, “multi-carrier” transmission and/or reception. This meansthe CA is used for transmission of signaling and data in the uplink anddownlink directions. One of the component carriers (CCs) in CarrierAggregation (CA) is the primary component carrier (PCC), also referredto as a primary carrier or anchor carrier. The remaining CCs are calledsecondary component carriers (SCCs), also referred to as secondarycarriers or supplementary carriers. The serving cell, as used herein, isinterchangeably called a primary cell (PCell) or primary serving cell(PSC). Similarly the secondary serving cell, as used herein, isinterchangeably called as secondary cell (SCell) or secondary servingcell (SSC).

Generally, the primary CC, i.e., PCC or PCell, carries the essentialwireless device specific signaling. The primary CC exists in both uplinkand downlink directions in CA. Where there is a single Uplink (UL) CC,the PCell is on that CC. Further, the network may assign differentprimary carriers to different wireless devices operating in the samesector or cell. Measurements are performed by the wireless device on theserving one or more cells (multiple serving cells may be with CA) aswell as on neighbor cells over some known reference symbols or pilotsequences. These measurements are done on cells on an intra-frequencycarrier, inter-frequency carrier(s) as well as on inter-Radio AccessTechnology (RAT) carriers(s), depending upon whether the wireless devicesupports that RAT.

In a CA scenario, the wireless device may perform the measurements onthe cells on the primary component carrier (PCC) as well as on the cellson one or more secondary component carriers (SCCs). A CA capablewireless device may also perform inter-frequency measurements withoutmeasurement gaps since the wireless device is configured with abroadband receiver and/or multiple receivers. Examples ofintra-frequency and inter-frequency measurements in LTE are Referencesymbol received power (RSRP) and Reference symbol received quality(RSRQ). Examples of intra-frequency and inter-frequency measurements inHigh speed packet access (HSPA) are Common pilot channel received signalcode power (CPICH RSCP) and CPICH Ec/No.

Measurements such as mobility measurements may also include identifyingor detecting a cell in which cell detection includes identifying atleast the physical cell identity (PCI), primary scrambling code (PSC) orbase station identity code (BSIC), and performing the signalmeasurement, e.g., RSRP, RSCP or RSSI, of the identified cell. Thewireless device may also have to acquire the cell global ID (CGI) of acell.

Examples of positioning measurements in LTE are reference signal timedifference (RSTD) for OTDOA positioning method, and wireless deviceRX-TX time difference measurement for E-CID positioning method. Thewireless device RX-TX time difference measurement requires the wirelessdevice to perform measurement on downlink reference signal as well as onuplink transmitted signals. Another example of positioning measurementsis UL Relative Time Of Arrival (RTOA), which is performed in UL on radiosignals (namely SRS) transmitted by the wireless device.

The radio measurements performed by the wireless device are used by thewireless device for one or more radio operational tasks. Examples ofsuch tasks are reporting the measurements to the network, which in turnmay use the measurements for various tasks. For example, in theRRC_CONNECTED state the wireless device reports radio measurements tothe serving node or to another network node via the serving node. Inresponse to the reported wireless device measurements, the network nodesuch as the serving node makes certain decisions, e.g., it may sendmobility command to the wireless device for the purpose of cell change,request more measurements, (re)configure the set of serving cell,(re)configure one or more network node parameters related to radiosignal transmission and/or reception configuration, calculate aperformance metric or performance statistical measure, etc. In anotherexample the wireless device may itself use the radio measurements forperforming tasks, e.g., cell reselection, etc.

Several positioning methods for determining the location of a targetdevice such as a wireless device, mobile relay, PDA, etc., exist.Several of these well-known methods include: Satellite based methodsthat use A-GNSS (e.g. A-GPS) measurements; OTDOA methods that useswireless device RSTD measurement; UTDOA, which uses measurements done atLMU; Enhanced cell ID that uses one or more of wireless device Rx-Txtime difference, BS Rx-Tx time difference, LTE P/RSRQ, HSPA CPICHmeasurements, angle of arrival (AoA) etc.; and hybrid methods that usemeasurements from more than one of these known methods. In LTE, thepositioning node configures the wireless device, eNodeB or LMU toperform one or more positioning measurements. The positioningmeasurements are used by the wireless device or positioning node todetermine the wireless device location. Once such positioning methodknown in the art is OTDOA that makes use of the measured timing ofdownlink signals received from multiple eNode Bs at the wireless device.

A multi-carrier SCell setup herein refers to a procedure which enablesthe network node to at least temporarily setup or release the use of aSCell, in DL and/or UL by the CA capable wireless device. The SCellsetup or release procedure or command can perform any one or more of:configuration of SCell(s), de-configuration of SCell(s), activation ofSCell(s), and deactivation of SCell(s). The configuration procedure(i.e. addition/release of SCell is used by the serving radio networknode, e.g., eNode B, to configure a CA capable wireless device with oneor more SCells. On the other hand, the de-configuration procedure isused by the eNode B to de-configure or remove one or more alreadyconfigured SCells (DL SCell, UL SCell or both). The configuration orde-configuration procedure can also be used to change the currentmulti-carrier configuration e.g. for increasing or decreasing the numberof SCells or for swapping the existing SCell(s) with new one(s).Further, the serving radio network node can activate one or moredeactivated SCells or deactivate one or more SCells on the correspondingconfigured secondary carriers. The PCell is always activated. Theconfigured SCells are initially deactivated upon addition and after acell change, e.g., handover. The deactivation of SCell saves wirelessdevice battery power.

The wireless device may perform measurements even on a deactivated SCellor other cells on the SCC with a deactivated SCell. In this case, themeasurements are performed in measurement cycles configured byprotocol(s) for higher network layers. It is expected that themeasurements of deactivated SCells or other cells on the SCC with adeactivated SCell are made without network provided measurement gaps.The PRS configuration for an RSTD and the SCell measurement cycle usedfor mobility measurements, e.g., RSRP and RSRQ, are examples ofmeasurement cycles. The SCell measurement cycles may have periodicity of160 ms, 320 ms, 640 ms or 1024 ms. The maximum time of a measurementwithin each measurement cycle is currently not restricted by ThirdGeneration Partnership Project (3GPP) standard, but in practice islikely to be up to 6 subframes in each cycle.

However, SCell setup or release, i.e., when SCell is configured,de-configured, activated or deactivated, may cause a glitch orinterruption of operation on the PCell or any other activated SCell.Similarly, a glitch or interruption of operation of the PCell or anyother activated SCell may occur when the radio for receiving thedeactivated SCell is enabled or disabled to make measurements of cellson the deactivated SCC. The term “operation” as used herein meansreception and/or transmission of signals. The glitch in UL and/or DLtypically occurs when the wireless device has a single radio chain toreceive and/or transmit more than one CC. In some situations, the glitchmay even occur when the wireless device has independent radio chains onthe same chip.

The glitch may occur when the carrier aggregation (CA) capable wirelessdevice changes its reception and/or transmission bandwidth (BW) fromsingle-carrier to multiple-carrier operation or vice versa. In order tochange the BW, the wireless device has to reconfigure its RF componentsin the RF chain, e.g., RF filter, power amplifier (PA), etc. Forexample, the interruption may be caused due to several factors includingRF tuning to reconfigure BW, i.e., shorten or extend, setting oradjusting of radio parameter such as an AGC setting, etc. Thisinterruption caused by the reconfiguration of RF components can varybetween 2-5 ms. The glitch may also occur even for interband CA, whereseparate RF receiver paths are typically used to receive signals on eachof the component carriers. In this case, glitches may occur when asingle radio frequency (RF) integrated circuit (IC) is used to implementthe receive paths. Transient effects may be caused by starting orstopping a local oscillator (LO) circuit which impacts another localoscillator circuit that is active.

During the interruption period the wireless device cannot transmitand/or receive any signal or information to/from the network. Further,during the interruption, the wireless device cannot perform measurementsdue the wireless device's inability to transmit and/or receive signalsto/from the network. This interruption period leads to the loss ordropping of packets transmitted between the wireless device and thewireless device's serving cell(s). It should be noted that theinterruption may impact several or all active carriers, and may affectboth the uplink and downlink.

When performing measurement on cells of the SCC with deactivatedSCell(s) without gaps the wireless device typically retunes thebandwidth of the wireless device receiver or activates another RF path.The cells may be an SCell and/or one or more neighbor cells of the SCC.Therefore, the interruption in DL and/or UL of serving cell occursbefore and after each measurement sample, i.e., when the bandwidth isextended, e.g., from 20 MHz to 40 MHz, and also when it is reverted backto the BW of the serving carriers, e.g., from 40 MHz to 20 MHz. Theinterruption may also occur when the serving carrier and SCC are on thesame chip. The interruption in each direction in this case can bebetween 2-5 ms, since the wireless device has to retune the centerfrequency and bandwidth of the downlink. The wireless device performsmeasurements on cells of SCC with deactivated SCell(s) on a regularbasis according to the Scell measurement cycle configured by the eNB.

In an existing solution to managing these interruptions, theinterruption on the PCell of up to five subframes is allowed forintra-band CA when any of the SCell setup or release procedures areexecuted by the wireless device. However, the interruption on the PCellof up to one subframe is allowed for inter-band CA when any of the SCellsetup or release procedures are executed by the wireless device.Further, in existing solutions to managing these interruptions, theSCell activation and deactivation delay requirements are defined for thewireless device which supports only one SCell in at least the DL.Therefore, when the wireless device is configured with the SCellactivates or deactivates, the SCell is not affected by any other servingcell, and the activating or deactivating does not affect any other SCellsince there is only one SCell.

However, for a wireless device capable of being configured with two ormore SCells, at least two SCells can also be deactivated and configuredwith SCell measurement cycles for doing measurements on SCCs withdeactivated SCells. In this configuration, the wireless device behaviorwith respect to the impact on the serving cell performance, e.g., PCellinterruption, is undefined in the 3GPP standards. This undefinedwireless device behavior may result in the wireless device being unableto be served by the serving cell and/or may degrade the measurementperformance of measurements on SCCs. In method for avoiding such asituation requires that all SCells be kept in an activated state, eventhough all of them are not needed all the time. However, this method isnot efficient as keeping all SCells in an activated state will degradewireless device battery life and may also require more processingresources in the network node.

SUMMARY

The present disclosure advantageously provides a method, wirelessdevice, network node and system for managing interruptions with multipledeactivated secondary cells (SCells). In particular, the presentdisclosure advantageously specifies wireless device behavior withrespect to serving cell performance when the wireless device isperforming measurements on SCCs with deactivated SCells. Anotheradvantage of the disclosure is that the procedures or processesdescribed herein ensure that at least a certain minimum serving cell,e.g., PCell or another activated SCell, performance is met by thewireless device when the wireless device is configured with at least twoSCCs with deactivated SCells. Further, the procedures described in thedisclosure enable the network node to be aware of wireless deviceperformance in terms of loss in serving cell performance when thewireless device measures on cells of at least two SCCs with deactivatedSCells. Another advantage of the disclosure is the procedures orprocesses described herein enable the network node to decide whether toconfigure the wireless device with a certain type of measurement cycle,e.g., PRS measurement configuration, SCell measurement cycle, etc., ornot, and also allows the network node to configure the periodicity ofthe measurement cycle for measuring cells on SCCs.

In one embodiment of the disclosure, a method for a wireless deviceserved by a first network node on a primary cell, PCell, is provided.The wireless device is capable of using at least two secondary servingcells, SCells. A first request to perform a measurement on at least onecell on a first secondary component carrier, SCC, with a deactivatedfirst SCell using at least a first measurement cycle is received. Asecond request to perform a measurement on at least one cell on a secondSCC with a deactivated second SCell using at least a second measurementcycle is received. An effective serving cell interruption probability,Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, direction isdetermined based on at least the first measurement cycle and the secondmeasurement cycle. When transmitting packets between a serving cell andthe wireless device, a serving cell interruption probability of a missedat least one of ACK and NACK signaling in the UL direction is ensured tonot exceed the determined effective serving cell interruptionprobability, Peff, of a missed at least one of ACK and NACK signaling inthe UL direction while performing the measurements on the cells of thefirst SCC and the second SCC.

According to one embodiment of this aspect, the ensuring that theserving cell interruption probability of missed at least one of ACK andNACK signaling in the UL direction does not exceed the determinedeffective serving cell interruption probability, Peff, of missed atleast one of ACK and NACK signaling includes adapting at least one radioprocedure to be performed by the wireless device. According to oneembodiment of this aspect, the adapting of at least one radio procedureincludes modifying a measurement sampling of measurements performed onthe cells by performing the measurements using first and secondmeasurement cycles during a same time period. According to anotherembodiment of this aspect, the adapting of at least one radio procedureincludes modifying a measurement sampling of measurements performed onthe cells by performing the measurements according to only an effectivemeasurement cycle, Ceff. The Ceff is based on the first measurementcycle and the second measurement cycle.

According to another embodiment of this aspect, the adapting of at leastone radio procedure includes modifying a measurement sampling ofmeasurements performed on the cells by performing the measurementsaccording to an effective measurement cycle, Ceff. The effectivemeasurement cycle, Ceff, is one of a minimum and maximum periodicity ofthe first measurement cycle and the second measurement cycle. Accordingto another embodiment of the disclosure, the measurements according tothe effective measurement cycle, Ceff, are performed such thatmeasurements on the first SCC are performed one of just before,simultaneously with and just after measurements on the second SCC.

According to another embodiment of this aspect, the adapting of at leastone radio procedure includes at least one of modifying measurementreporting, modifying UL transmission configuration in time and droppingat least one UL transmission. According to another embodiment of thisaspect, the determining of the serving cell interruption probability,Peff, includes determining an effective measurement cycle periodicity,Ceff, the Ceff being based on the first measurement cycle and the secondmeasurement cycle. The serving cell interruption probability, Peff, isdetermined based on the effective measurement cycle periodicity, Ceff.According to another embodiment of this aspect, the effectivemeasurement cycle periodicity, Ceff, is based on at least one of aminimum function and maximum function applied to a periodicity of thefirst measurement cycle and a periodicity of the second measurementcycle.

According to another embodiment of this aspect, the determining theserving cell interruption probability, Peff, includes determining aneffective measurement cycle periodicity, Ceff, and mapping the effectivemeasurement cycle periodicity, Ceff, to the effective cell interruptionprobability, Peff. The Ceff is based on the first measurement cycle andthe second measurement cycle. According to another embodiment of thisaspect, the first measurement cycle is used by the wireless device forperforming one of mobility measurements and positioning measurements onthe first SCC, and the second measurement cycle is used by the wirelessdevice for performing one of mobility measurements and positioningmeasurements.

According to another embodiment of this aspect, the serving cell is oneof the PCell and at least one activated SCell. According to anotherembodiment of this aspect, the wireless device is served by only thePCell and is one of configured and reconfigured with only the first SCC.A second effective serving cell interruption probability, Peff2, ofmissed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, direction isdetermined based on the first measurement cycle. When transmittingpackets between a serving cell and the wireless device, a serving cellinterruption probability of a missed at least one of ACK and NACKsignaling in the UL direction is ensured to not exceed the determinedsecond effective serving cell interruption probability, Peff2, of amissed at least one of ACK and NACK signaling in the UL direction whileperforming the measurements on the cells of the first SCC. According toanother embodiment of this aspect, the first measurement cycle and thesecond measurement cycles are any of: a first SCell measurement cycleand a second SCell measurement cycle used by the wireless device forperforming mobility measurements; and a first Positioning ReferenceSignal, PRS, configuration periodicity and a second PRS configurationperiodicity used by the wireless device for performing positioningmeasurements.

According to another embodiment of the disclosure, a wireless deviceserved by a first network node on a primary cell, PCell, is provided.The wireless device is capable of using at least two secondary servingcells, SCells. The wireless device includes a receiver configured toreceive a first request to perform a measurement on at least one cell ona first secondary component carrier, SCC, with a deactivated first SCellusing at least a first measurement cycle. The receiver is furtherconfigured to receive a second request to perform a measurement on atleast one cell on a second SCC with a deactivated second SCell using atleast a second measurement cycle. The wireless device further includes aprocessor. The wireless device further includes a memory configured tostore computer instructions that, when executed by the processor, causethe processor to determine an effective serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, directionbased on at least the first measurement cycle and the second measurementcycle. The processor is further caused to ensure that when transmittingpackets between a serving cell and the wireless device, a serving cellinterruption probability of missed at least one of ACK and NACKsignaling in the UL direction does not exceed the determined effectiveserving cell interruption probability, Peff, of missed at least one ofACK and NACK signaling in the UL direction while performing themeasurements on the cells of the first SCC and the second SCC.

According to another embodiment of this aspect, a memory is configuredto store measurement cycle durations and the effective serving cellinterruption probability. According to another embodiment of thisaspect, the ensuring that the serving cell interruption probability ofmissed at least one of ACK and NACK signaling in the UL direction doesnot exceed the determined effective serving cell interruptionprobability, Peff, of missed at least one of ACK and NACK signalingincludes adapting at least one radio procedure performed by the wirelessdevice. According to another embodiment of this aspect, the adapting ofat least one radio procedure includes modifying a measurement samplingof measurements performed on the cells by performing the measurementsusing first and second measurement cycles during a same time period.

According to another embodiment of this aspect, the adapting of at leastone radio procedure includes modifying a measurement sampling ofmeasurements performed on the cells by performing the measurementsaccording to only an effective measurement cycle, Ceff. The Ceff isbased on the first measurement cycle and the second measurement cycle.According to another embodiment of this aspect, the adapting of at leastone radio procedure includes modifying a measurement sampling ofmeasurements performed on the cells by performing the measurementsaccording to an effective measurement cycle, Ceff. The effectivemeasurement cycle, Ceff, is one of a minimum and maximum periodicity ofthe first measurement cycle and the second measurement cycle. Accordingto another embodiment of this aspect, the measurements according to theeffective measurement cycle, Ceff, are performed such that measurementson the first SCC are performed one of just before, simultaneously withand just after measurements on the second SCC.

According to another embodiment of this aspect, the adapting of at leastone radio procedure includes at least one of modifying measurementreporting, modifying UL transmission configuration in time and droppingat least one UL transmission. According to another embodiment of thisaspect, the determining of the serving cell interruption probability,Peff, includes determining an effective measurement cycle periodicity,Ceff. The Ceff is based on the first measurement cycle and the secondmeasurement cycle. The serving cell interruption probability, Peff, isdetermined based on the effective measurement cycle periodicity, Ceff.

According to another embodiment of this aspect, the effectivemeasurement cycle periodicity, Ceff, is based on at least one of aminimum function and maximum function applied to a periodicity of thefirst measurement cycle and a periodicity of the second measurementcycle. According to another embodiment of this aspect, The determiningthe serving cell interruption probability, Peff, includes determining aneffective measurement cycle periodicity, Ceff. The Ceff is based on thefirst measurement cycle and the second measurement cycle. Thedetermining further includes mapping the effective measurement cycleperiodicity, Ceff, to the effective cell interruption probability, Peff.

According to another embodiment of this aspect, the first measurementcycle is used by the wireless device for performing one of mobilitymeasurements and positioning measurements on the first SCC, and thesecond measurement cycle performs one of mobility measurements andpositioning measurements. According to another embodiment of thisaspect, the serving cell is one of the PCell and at least one activatedSCell.

According to another embodiment of the disclosure, a method in a networknode is provided. A threshold of a serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink direction allowedby a wireless device when measuring in cells of at least two secondarycomponent carriers, SCCs, with deactivated secondary cells, SCells,using respective measurement cycles is determined. The serving cellinterruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inthe uplink channel is ensured to be below the threshold. The at leastone measurement cycle being a period with which the wireless deviceperforms measurements on at least one cell of at least two SCCs.

According to another embodiment of this aspect, the ensuring that theserving cell interruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inthe uplink direction is below the threshold includes modifying at leastone parameter associated with at least one measurement cycle. Accordingto another embodiment of this aspect, the at least one parameterincludes at least one of a periodicity of the measurement cycle and atime offset of the measurement cycle. According to another embodiment,an effective measurement cycle, Ceff, is determined based on themeasurement cycles. A serving cell interruption probability, Peff, isdetermined based on the effective measurement cycle, Ceff. The modifyingof the at least one measurement cycle is based on the determined servingcell interruption probability, Peff. According to another embodiment ofthis aspect, the effective measurement cycle periodicity, Ceff, is basedon at least one of a minimum function and maximum function applied tothe measurement cycles.

According to another embodiment of this aspect, the determining of theserving cell probability, Peff, includes mapping the effectivemeasurement cycle periodicity, Ceff, to a predefined serving cellinterruption probability, Peff. According to another embodiment of thisaspect, the at least one measurement cycle is any of: a SCellmeasurement cycle used by the wireless device for performing mobilitymeasurements, and a PRS configuration periodicity used by the wirelessdevice for performing positioning measurements.

According to another embodiment of this disclosure, a network node isprovided. The network node includes a processor and a memory. The memoryis configured to store: measurement cycle durations, a serving cellinterruption probability, Peff, a threshold, Pthresh, of the servingcell interruption probability, and computer instructions that, whenexecuted by the processor, cause the processor to determine a thresholdof a serving cell interruption probability, Peff, of missed at least oneof Acknowledgement, ACK, and Negative-Acknowledgement, NACK, signalingin an uplink direction allowed by a wireless device when measuring incells of at least two secondary component carriers, SCCs, withdeactivated secondary cells, SCells, using respective measurementcycles. The computer instructions that, when executed by the processor,further cause the processor to ensure the serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in the uplink channel is belowthe threshold. The at least one measurement cycle is a duration in whichthe wireless device performs measurements on at least one cell of atleast two SCCs.

According to another embodiment of this aspect, the ensuring that theserving cell interruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inthe uplink direction is below the threshold includes modifying at leastone measurement cycle. According to another embodiment of this aspect,the memory is further configured to store additional computerinstructions that, when executed by the processor, cause the processorto determine an effective measurement cycle, Ceff, based on themeasurement cycles and determine a serving cell interruptionprobability, Peff, based on the effective measurement cycle, Ceff. Themodifying of the at least one measurement cycle being based on thedetermined serving cell interruption probability, Peff. According toanother embodiment of this aspect, the effective measurement cycleperiodicity, Ceff, is based on at least one of a minimum function andmaximum function applied to the measurement cycles. According to anotherembodiment of this aspect, the determining of the serving cellprobability, Peff, includes mapping the effective measurement cycleperiodicity, Ceff, to a predefined serving cell interruptionprobability, Peff.

According to another embodiment of the disclosure, a network node isprovided. The network node includes a measurement configuration moduleconfigured to determine a threshold, Pthresh, of a serving cellinterruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inan uplink signal allowed by a wireless device when measuring in cells ofat least two secondary component carriers, SCC, with deactivatedsecondary cells, SCells, using respective measurement cycles. Themeasurement configuration module is further configured to adapt at leastone measurement cycle based on at least one pre-defined rule, the atleast one measurement cycle being a duration in which the wirelessdevice performs measurements on at least one cell of at least two SCCs,such that a serving cell interruption probability of missed at least oneof Acknowledgement, ACK, and Negative-Acknowledgement, NACK, signalingin the uplink signal caused by the wireless device remains below thedetermined threshold, Pthresh.

According to another embodiment of the disclosure, a wireless device isprovided. The wireless device is served by a first network node on aprimary cell, PCell. The wireless device is capable of using at leasttwo secondary serving cells, SCells. The wireless device includes areceiver module configured to receive a first request to perform ameasurement on at least one cell on a first secondary component carrier,SCC, with a deactivated first SCell using at least a first measurementcycle, and receive a second request to perform a measurement on at leastone cell on a second SCC with a deactivated second SCell using at leasta second measurement cycle. The wireless device includes an adaptermodule configured to determine an effective serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, directionbased on at least the first measurement cycle and the second measurementcycle, and ensure that when transmitting packets between a serving celland the wireless device, a serving cell interruption probability ofmissed at least one of ACK and NACK signaling in the UL direction doesnot exceed the determined effective serving cell interruptionprobability, Peff, of missed at least one of ACK and NACK signaling inthe UL direction while performing the measurements on the cells of thefirst SCC and the second SCC.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of the present invention, and theattendant advantages and features thereof, will be more readilyunderstood by reference to the following detailed description whenconsidered in conjunction with the accompanying drawings wherein:

FIG. 1 is a block diagram of an exemplary system that manages servingcell performance in accordance with the principles of the disclosure;

FIG. 2 is a block diagram of an exemplary wireless device in accordancewith the principles of the disclosure;

FIG. 3 is a signaling flow diagram of an exemplary process of firstprocedure adapter module for managing serving cell performance inaccordance with the principles of the disclosure;

FIG. 4 is signaling flow diagram of an exemplary process of secondprocedure adapter module for managing serving cell performance inaccordance with the principles of the disclosure;

FIG. 5 is a block diagram of an exemplary network node for managingserving cell performance in accordance with the principles of thedisclosure;

FIG. 6 is a signaling flow diagram of an exemplary process ofmeasurement cycle adapter module in accordance with the principles ofthe disclosure;

FIG. 7 is an alternative block diagram of the wireless device inaccordance with the principles of the disclosure; and

FIG. 8 is an alternative block diagram of the network node in accordancewith the principles of the disclosure.

DETAILED DESCRIPTION

The method, wireless device, network node and system described hereinprovide for carrier aggregation operation of wireless devices, and inparticular to managing serving cell performance when performingmeasurements on at least one secondary component carrier (SCC). Thepresent disclosure advantageously specifies wireless device behaviorwith respect to serving cell performance when the wireless device isperforming measurements on SCCs with deactivated SCells. Anotheradvantage of the disclosure is that the procedures or processesdescribed herein ensure that at least a certain minimum serving cell,e.g., PCell or another activated SCell, performance is met by thewireless device when the wireless device is configured with at least twoSCCs with deactivated SCells. Further, the predefined proceduresdescribed in the disclosure enable the network node to be aware ofwireless device performance in terms of loss in serving cell performancewhen the wireless device measures on cells of at least two SCCs withdeactivated SCells. Another advantage of the disclosure is that theprocedures or processes described herein enable the network node todecide whether to configure the wireless device with a certain type ofmeasurement cycle, e.g., PRS measurement configuration, SCellmeasurement cycle, etc., or not, and also allows the network node toconfigure the periodicity of the measurement cycle for measuring cellson SCCs.

Accordingly, the wireless device, network node, and system componentshave been represented where appropriate by conventional symbols in thedrawings, showing only those specific details that are pertinent tounderstanding the embodiments of the concepts described herein so as notto obscure the disclosure with details that will be readily apparent tothose of ordinary skill in the art having the benefit of the descriptionherein. In some embodiments, non-limiting term wireless device is usedin which wireless device can be any type of wireless device capable ofcommunicating with network node or another wireless device over radiosignals. Further, wireless device may also be radio communicationdevice, target device, device to device wireless device, user equipment(UE), machine type wireless device or wireless device capable of machineto machine communication, a sensor equipped with wireless device, iPAD,Tablet, mobile terminals, mobile telephone, laptop computer, appliance,automobile, smart phone, laptop embedded equipped (LEE), laptop mountedequipment (LME), USB dongles and Customer Premises Equipment (CPE),among other devices that can communicate radio or wireless signals asare known in the art.

Before describing in detail exemplary embodiments that are in accordancewith the disclosure, it is noted that the embodiments reside primarilyin combinations of wireless device and network node components andprocessing steps related to managing serving cell performance whenperforming measurements on at least one secondary component carrier(SCC). Accordingly, components have been represented where appropriateby conventional symbols in the drawings, shown only those specificdetails that are pertinent to understanding the embodiments of thedisclosure so as not to obscure the disclosure with details that will bereadily apparent to those of ordinary skill in the art having thebenefit of the description herein.

As used herein, relational terms, such as “first,” “second,” “top” and“bottom,” and the like, may be used solely to distinguish one entity orelement from another entity or element without necessarily requiring orimplying any physical or logical relationship or order between suchentities or elements. The terminology used herein is for the purpose ofdescribing particular embodiments only and is not intended to belimiting of the concepts described herein. As used herein, the singularforms “a”, “an” and “the” are intended to include the plural forms aswell, unless the context clearly indicates otherwise. It will be furtherunderstood that the terms “comprises,” “comprising,” “includes” and/or“including” when used herein, specify the presence of stated features,integers, steps, operations, elements, and/or components, but do notpreclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this disclosure belongs. It willbe further understood that terms used herein should be interpreted ashaving a meaning that is consistent with their meaning in the context ofthis specification and the relevant art and will not be interpreted inan idealized or overly formal sense unless expressly so defined herein.

In embodiments described herein, the joining term, “in communicationwith” and the like, may be used to indicate electrical or datacommunication, which may be accomplished by physical contact, induction,electromagnetic radiation, radio signaling, infrared signaling oroptical signaling, for example. One having ordinary skill in the artwill appreciate that multiple components may interoperate andmodifications and variations are possible of achieving the electricaland data communication.

Referring now to drawing figures in which like reference designatorsrefer to like elements there is shown in FIG. 1 an exemplary system formanaging serving cell performance when performing measurements on atleast one secondary component carrier (SCC) in accordance with theprinciples of the disclosure and designated generally as “10.” System 10includes one or more network nodes 12 and one or more wireless devices14 a-14 n (referred to collectively as wireless device 14). In one ormore embodiments, wireless device 14 is served by network node 12 withPCell 16 operating on a first carrier frequency f1 (PCC), and wirelessdevice 14 is also capable of being served by at least two secondaryserving cells, e.g., SCell 18 and SCell 20, operating on respectivefrequencies, e.g., f2 (SCC₁) and f3 (SCC₂). In some embodiments,wireless device 14 is also capable of being served by a third SCelloperating on carrier frequency f4 (SCC₃). Wireless device 14 is alsoconfigured with at least a first measurement cycle for a first type ofmeasurement (C11) for measuring cells on SCC₁, and wireless device 14 isalso configured with at least a second measurement cycle for the firsttype of measurement (C21) for measuring cells on SCC₂. The term “served”or “being served” with respect to wireless device 14 means that wirelessdevice 14 is configured with the corresponding cells, e.g., PCell andSCell(s), and can receive from and/or transmit data to network node 14on the serving cell, e.g. on PCell or any of SCell. The data istransmitted or received via physical channels, e.g. PDSCH in DL, PUSCHin UL, etc.

In some embodiments, generic terminology such as “network node” or“radio network node” is used in which “network node” may refer to a basestation, radio base station, base transceiver station, base stationcontroller, network controller, evolved Node B (eNB), Node B, RNC, relaynode, positioning node, E-SMLC, location server, repeater, access point,radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH),multi-standard radio (MSR) radio node such as MSR BS nodes indistributed antenna system (DAS), SON node, O&M, OSS, MDT node, Corenetwork node and/or MME, among other network nodes known in the art.

In one or more embodiments of the disclosure, network node 12 providesPrimary component carrier (PCC) 16 or PCell 16, secondary componentcarrier (SCC₁) 18 or SCell 18, and another secondary component carrier(SCC₂) 20 or SCell 20. As discussed in the background section of thedisclosure, PCC 16 carries the essential wireless device specificsignaling, and PCC 16 is always activated for wireless device 14.Network node 12 can activate one or more SCells, e.g., SCC₁ and/or SCC₂,for wireless device 14. Further, the coverage areas of PCC 16, SCC₁ 18and SCC₂ 20 may vary, and the number of SCCs may vary. In one or moreembodiments of the disclosure, network node 12 includes MeasurementCycle Adaptor Module 22 for ensuring serving cell performance whenwireless device 14 performs at least one measurement on at least oneSCC, as discussed in detail with respect to FIGS. 4 and 5.

In one or more embodiments of the disclosure, wireless device 14includes Procedure Adapter Module 24 for ensuring serving cellperformance when wireless device 14 performs at least one measurement onat least one SCC, as discussed in detail with respect to FIGS. 2 and 3.Further, one or more embodiments of the disclosure are applicable to anyRAT or multi-RAT systems, which involve measurement without gaps and/ormulti-carrier operation, e.g., LTE FDD/TDD, WCDMA/HSPA, GSM/GERAN, WiFi, CDMA2000, etc. One or more embodiments of the disclosure are alsoapplicable to procedures or radio operations performed by wirelessdevice 14 in any RRC state, e.g., RRC connected state, CELL_DCH state,idle state, idle mode, CELL_PCH, URA_PCH, CELL_FACH, etc. Further, whileonly network node 12 is illustrated providing PCC 16, SCC₁ 18 and SCC₂20, one or more co-located or non-co-located nodes may provide one ormore component carriers in one or more embodiments of the disclosure.

In system 10, the transmission of signals, transmission opportunitiesand/or measurement opportunities between wireless device 14 and servingcell(s) (at least the PCell 16) are interrupted during the timeinstances or bursts of periods when wireless device 14 performs one ormore of the following radio operations on at least cells of SCC₁ 18:

-   -   One or more radio measurements on at least one cell on SCCs with        deactivated SCell; and    -   SCell setup or release operation on at least SCC₁, i.e.,        activation of SCell, deactivation of SCell, configuration of SCC        or de-configuration of SCC.        Furthermore, the transmission of signals or transmission        opportunities and/or measurement opportunities between wireless        device 14 and SCell 18 is interrupted/lost during time instances        or bursts of periods when wireless device 14 performs one or        more of the above radio operations on cells of at least SCC₂ 20.        For example if wireless device 14 measures on cells of SCC₂ 20        with deactivated SCell, then the transmission of signaled        between the wireless device and the first SCell, i.e., SCC₁ 18        or SCell 18, is lost or interrupted.

In one or more embodiments, the interruptions at SCell addition orrelease for intra-band CA with two downlink SCells is allowed for up tofive subframes on PCell and other activated SCell during an RRCreconfiguration procedure. This interruption is for both uplink anddownlink of PCell and the other activated SCell. In one or moreembodiments, interruptions at SCell addition or release for inter-bandCA with two downlink SCells are allowed for up to one subframe on PCelland the other activated SCell during a RRC reconfiguration procedure.This interruption is for both uplink and downlink of PCell and the otheractivated SCell. In one or more embodiments, interruptions are allowedat SCell addition or release for combined intra-band and inter-band CAwith two downlink SCells. For example, SCell is added or released, thewireless device is allowed interruption: on PCell for up to fivesubframes during the RRC reconfiguration procedure provided that PCelland SCell are in the same frequency band, or for up to one subframesduring the RRC reconfiguration procedure if SCell and PCell are indifferent frequency bands; and on the other activated SCell for up tofive subframes provided that both SCells are in the same frequency bandor for up to one subframes provided that SCells are in differentfrequency bands. The interruption is for both uplink and downlink ofPCell and other activated SCell.

In one or more embodiments, when an intra-band SCell is activated ordeactivated, wireless device 14 is allowed an interruption of up to fivesubframes on PCell and the other activated SCell during the activationor deactivation delay. The interruption is for both uplink and downlinkof PCell and the other activated SCell. In one or more embodiments, whenthe inter-band SCell is activated or deactivated, wireless device 14that requires interruption is allowed an interruption of up to onesubframe on PCell and the other activated SCell during the activation ordeactivation delay. The interruption is for both uplink and downlink ofPCell and the other activated SCell. In one or more embodiments, when aSCell is activated or deactivated, wireless device 14 is allowed aninterruption: on PCell of up to five subframes provided that the SCelland the PCell are in the same frequency band or on PCell of up to onesubframe provided that the SCell and the PCell are in differentfrequency bands, and on the other activated SCell for up to fivesubframes provided that both SCells are in the same frequency band or onPCell for up to one subframes provided that the two SCells are indifferent frequency bands. The interruption is for both uplink anddownlink of PCell and the other activated SCell.

In one or more embodiments, if only one SCell is activated, then theinterruption on the PCell and the activated SCell due to measurements onSCC with the deactivated SCell are allowed with up to 0.5% probabilityof missed at least one of ACK and NACK when the configuredmeasCycleSCell is 640 ms or longer for the deactivated SCell. If bothSCells are deactivated then the interruptions on the PCell due tomeasurements on the SCCs with the deactivated SCells are allowed up to0.5% probability of missed at least one of ACK and NACK provided thatthe configured measCycleSCell is 640 ms or longer for at least onedeactivated SCell. Each interruption shall not exceed five subframes.

In one or more embodiments, if only one SCell is activated, then theinterruptions on the PCell and the activated SCell due to measurementson SCC with the deactivated SCell are allowed with up to 0.5%probability of missed at least one of ACK and NACK signaling when theconfigured measCycleSCell is 640 ms or longer for the deactivated SCell.If both SCells are deactivated then the interruptions on the PCell dueto measurements on the SCCs with the deactivated SCells are allowed upto 0.5% probability of missed at least one of ACK and NACK signalingprovided that the configured measCycleSCell is 640 ms or longer for atleast one deactivated SCell. Each interruption shall not exceed onesubframe.

In one or more embodiments, if one SCell is activated and the otherSCell is deactivated, wireless device is allowed, due to measurements onthe SCC with deactivated SCell, (1) an interruption on PCell with up to0.5% probability of missed at least one of ACK and NACK signaling whenthe configured measCycleSCell for the deactivated SCell is 640 ms orlonger; (2) an interruption on PCell with up to 0.5% probability ofmissed at least one of ACK and NACK signaling regardless of theconfigured measCycleSCell for the deactivated SCell if indicated by thenetwork. Each interruption shall not exceed: one subframe if the PCellis not in the same band as the deactivated SCell, and five subframes ifthe PCell is in the same band as the deactivated SCell; (3) aninterruption on the activated SCell with up to 0.5% probability ofmissed at least one of ACK and NACK when the configured measCycleSCellfor the deactivated SCell is 640 ms or longer; and (4) an interruptionon the activated SCell with up to 0.5% probability of missed at leastone of ACK and NACK signaling regardless of the configuredmeasCycleSCell for the deactivated SCell if indicated by the network.Each interruption shall not exceed: one subframes if the activated SCellis not in the same band as the deactivated SCell, and five subframes ifthe activated SCell is in the same band as the deactivated SCell.

In one or more embodiment, if both SCells are deactivated, wirelessdevice is allowed, due to measurements on the SCCs with deactivatedSCells, (1) an interruption on PCell with up to 0.5% probability ofmissed at least one of ACK and NACK signaling when any of the configuredmeasCycleSCell for the two deactivated SCells is 640 ms or longer, (2)an interruption on PCell with up to 0.5% probability of missed at leastone of ACK and NACK signaling regardless of the configuredmeasCycleSCell for the two deactivated SCells if indicated by thenetwork. Each interruption shall not exceed: one subframe if the PCellis not in the same band as any of the deactivated SCells and fivesubframes if the PCell is in the same band as any of the deactivatedSCells.

If one SCell is activated and the other SCell is deactivated, then dueto RSTD measurements on the SCC with deactivated SCell, the wirelessdevice is allowed: (1) an interruption on PCell with up to 1.0%probability of missed at least one of ACK and NACK signaling when thePRS periodicity is 640 ms or longer. Each interruption shall not exceed:one subframe if the PCell is not in the same band as the deactivatedSCell and five subframes if the PCell is in the same band as thedeactivated SCell; and (2) an interruption on the activated SCell withup to 1.0% probability of missed at least one of ACK and NACK signalingwhen the PRS periodicity is 640 ms or longer. Each interruption shallnot exceed: one subframe if the activated SCell is not in the same bandas the deactivated SCell and five subframes if the activated SCell is inthe same band as the deactivated SCell. If both SCells are deactivated,then due to RSTD measurements on one or both SCCs with deactivatedSCells, the wireless device is allowed: (1) an interruption on PCellwith up to 1.0% probability of missed at least one of ACK and NACKsignaling when the configure PRS periodicity is 640 ms or longer in anyof the SCCs. Each interruption shall not exceed: one subframe if thePCell is not in the same band as any of the deactivated SCells and fivesubframes if the PCell is in the same band as any of the deactivatedSCells.

One or more embodiments described below involve three carriers, i.e.,PCC 16, SCC₁ 18 and SCC₂ 20, as illustrated in FIG. 1, or may involvefour carriers such as PCC, SCC₁ 18, SCC₂ 20 and SCC₃ (not shown).However, the one or more embodiments are also applicable to the scenariowhere wireless device 14 is configured to measure on any number of SCCs,e.g. SCC₁, SCC₂, . . . , SCCn, with at least two of SCCs having beendeactivated SCells. The one or more embodiments are also applicable tothe scenario where wireless device 14 is configured to measure on acombination of non-serving carriers, e.g., inter-frequency and/orinter-RAT carriers, and SCC(s).

The interruption of signals between wireless device 14 and the servingcell, e.g. PCell 16 or SCell 18, 20, leads to loss or degradation ofserving cell performance. The interruptions may affect PCell and/or oneor more active SCells. The loss in serving cell performance can beexpressed in terms of one or more metrics, which may be absolute orrelative, such as error rate, loss of packets, packet loss rate, numberof packets lost, packet drop rate, a reduction in the detectionprobability, an increase of misdetection probability, and probability ofmissed or dropped or lost packets. The performance measure used tomeasure and/or control the impact of interruption is referred to asinterruption impact measure, which may be the actual measure or a targetmeasure. A “packet” refers to any “block of data” such as a transportblock sent over radio interface in UL or DL. The packet loss rate ornumber of lost packets is estimated over a certain period of time, e.g.,measurement time of a radio measurement, pre-defined time, etc.

In one example, the number of lost packets is expressed as total numberof missed at least one of Acknowledgement (ACK) andNegative-Acknowledgement (NACK) signaling in response to continuoustransmission of data to wireless device 14 from its serving cell overcertain time period. In LTE, the transmission opportunity or schedulinginstance is one millisecond (ms), i.e., one Transmission Time Interval(TTI). Therefore, for example, the number of packets lost in LTE is 10if wireless device 14 is unable to transmit ten at least one of ACK andNACK messages in the UL direction in response to continuous DLtransmission over a period of 100 ms. In this example, the correspondingpacket loss rate is 10% or 0.1. The corresponding packet loss rate mayalso be stated as the probability with which the fraction of at leastone of ACK and NACK messages/signaling is transmitted in the uplinkdirection in response to continuous DL transmission over a period aremissed, dropped or lost. The corresponding packet loss rate may beexpressed as the ratio of:

-   -   the number of missed at least one of ACK and NACK        messages/signaling in response to continuous transmission of        data to wireless device 14 from its serving cell over certain        time period (T0) to    -   the total number of at least one of ACK and NACK        messages/signaling in response to continuous transmission of        data to wireless device 14 from its serving cell if all data        blocks are received.        Therefore, the serving cell performance, e.g., PCell 16 or SCell        18 or 20 performance, may be expressed in terms of the        probability of missed at least one of ACK and NACK        messages/signaling. More specifically it can be expressed as the        serving cell interruptions in terms of the probability of missed        at least one of ACK and NACK signaling. For consistency herein,        the term “serving cell interruption probability of missed at        least one of ACK and NACK” is used to refer to the serving cell        interruptions in terms of the probability of missed at least one        of ACK and NACK signaling. Interruption on PCell 16 are referred        to as “PCell interruption probability of missed at least one of        ACK and NACK” signaling. Interruption on any SCell are referred        to as “SCell interruption probability of missed at least one of        ACK and NACK” signaling.

In one or more embodiments, at least two of the first, second, third andfourth network nodes are the same node or are co-located at the samesite or location. For example, the wireless device may receive one ormore messages for setting up or releasing one or more SCells from thefirst network node. In another example, the wireless device may receiveone or more messages for setting up or releasing one or more SCells fromthe PCell. In one or more embodiments, any combination of the first,second, third and fourth network nodes are different nodes and may belocated at different sites/location or may be logically different nodesthat may still be co-located at the same site/location. In suchembodiments, wireless device 14 may receive one or more messages forsetting up or releasing one or more SCells from the respective SCells.

An exemplary block diagram of wireless device 14 is described withreference to FIG. 2. Wireless device 14 includes one or moretransmitters 26 and one or more receivers 28 for communicating withnetwork node 12 and other wireless devices 14, among other devices. Inone embodiment, transmitter 26 and receiver 28 may be one or moretransceivers. Wireless device 14 includes one or more processors 30 forperforming wireless device functions and memory 32 in communication theprocessor in which memory 32 may store modules, programming instructionsand data. In one or more embodiments, wireless device 14 stores firstprocedure adapter module 24. For example, Procedure Adapter Module 24includes program instructions, which when executed by processor 30,cause processor 30 to perform the functions described in detail withrespect to FIG. 3. wireless device 14 is configured to perform functionsaccording to first procedure adapter module 24 when wireless device 14is configured to use two or more SCCs with at least two deactivatedSCells. This wireless device 14 configuration is referred to as anenhanced mode of operation or a second mode of operation. The first modeoperation is discussed below with respect to second procedure adaptermodule 25. In one or more embodiments, wireless device 14 stores secondprocedure adapter module 25. For example, second procedure adaptermodule includes program instructions, which when executed by processor30, cause processor 30 to perform the ensuring functions of secondprocedure adapter module 25 described in detail with respect to FIG. 4.The term “modules” as used herein may refer to software implementation,hardware implement or both hardware and software implementation.

An exemplary flow diagram for procedure adapter module 24 is illustratedin FIG. 3. The embodiment illustrated in FIG. 3 relates to wirelessdevice 14 operating in the scenario where wireless device 14 is servedby first network node 12 with PCell 16 operating on a first carrierfrequency, and wireless device 14 is also configured to be capable ofbeing served by at least two secondary SCells, i.e., SCell 16 operatingon a second carrier frequency and SCell 18 operating on a third carrierfrequency. Wireless device 14 configured with two or more SCCs with atleast two deactivated SCells is referred to as enhanced mode ofoperation. wireless device 14 may also be configured to be capable ofbeing served by a third SCell operating on a fifth carrier frequency.Further, the measurement cycle described with respect to FIG. 3 may be aCA measurement cycle or measurement configuration, e.g., RSTDmeasurement configuration received in the OTDOA assistance data by thewireless device from the positioning node.

Receiver 28 receives a first request to perform a measurement on atleast one cell on a secondary component carrier (SCC) a deactivatedfirst SCell using at least a first measurement cycle (Block S100). Forexample, wireless device 14 receives a first request from network node12 to perform a measurement on at least one cell on secondary componentcarrier, e.g., SCC₁ 18, of a deactivated SCell using at least a firstmeasurement cycle. Receiver 28 receives a second request to perform ameasurement on at least one cell on a second SCC with a deactivatedsecond SCell using at least a second measurement cycle (Block S102). Forexample, wireless device 14 receives a second request from network node12 to perform a measurement on at least one cell on secondary componentcarrier, e.g., SCC₂ 20, of a deactivated SCell using at least a secondmeasurement cycle.

Processor 30 of wireless device 14 is configured to determine aneffective serving cell interruption probability (Peff) of missed atleast one of Acknowledgement (ACK) and Negative-Acknowledgement (NACK)signaling in an uplink (UL) direction based on at least the firstmeasurement cycle and the second measurement cycle (Block S104). In oneor more embodiments, wireless device 14 uses at least one pre-definedrule or function to derive or determine an effective measurement cycleor measurement cycle periodicity (C_(eff)), which is a function of atleast the first measurement cycle and the second measurement cycle withwhich wireless device 14 is configured by network node 12 to performradio measurements on at least one cell of the SCC₁ 18 and at least onecell of the SCC₂ 20, respectively. Several general and specific examplesof predefined rules or functions used by wireless device 14 for derivingthe effective measurement cycle (C_(eff)) will now be discussed.

In one example of a general function for deriving C_(eff) is given inEquation 1 when CA capable wireless device 14 is configured with Mnumber of SCCs with their deactivated SCells.

C _(eff) =g{g ₁(C ₁₁ ,C ₁₂ , . . . ,C _(1N)),g ₂(C ₂₁ ,C ₂₂ , . . . ,C_(2N)), . . . ,g _(M)(C _(M1) ,C _(M2) , . . . ,C _(MN))}   (Equation 1)

Where:

-   -   C_(1N) is the periodicity of measurement cycle of type N        configured at wireless device 14 by network node 12 for        performing radio measurements on one or more cells of SCC₁ 18        with deactivated SCell, i.e., when a first SCell is deactivated.    -   C_(2N) is the periodicity of measurement cycle of type N        configured at wireless device 14 by network node 12 for doing        radio measurements on one or more cells of SCC₂ with deactivated        SCell, i.e., when a second SCell is deactivated.    -   C_(MN) is the periodicity of measurement cycle of type N        configured at wireless device 14 by network node 12 for doing        radio measurements on one or more cells of SCC_(M) with        deactivated SCell, i.e., when a M^(th) SCell is deactivated.    -   Functions g{ . . . }, g1( . . . ), g2( . . . ) and gM( . . . )        can be realized by any suitable operation know in the art.        Examples of such operations include: maximum, minimum, xth        percentile, mean, a linear combination of g1( . . . ), g2( . . .        ) and gM( . . . ), a non-linear combination of g1( . . . ), g2(        . . . ) and gM( . . . ), etc.        The measurement cycle may be of different types such as: an        SCell measurement cycle, e.g., periodicity=640 ms, used for        mobility measurements, e.g., RSRP, RSRQ etc., and a PRS        configuration, e.g., PRS periodicity=1024 ms, used for        positioning measurements, e.g., RSTD. Wireless device 14 can        acquire the OTDOA PRS configuration for performing RSTD        measurements from network node 12 that may be a positioning node        or serving network node of wireless device 14 such as an        eNode B. The OTDOA PRS configuration may also be referred to as        RSTD configuration.

Other examples of general functions for deriving C_(eff) are illustratedbelow in Equations 2 to Equation 4 where a CA capable wireless device isconfigured with M number of SCCs with their deactivated SCells.

C _(eff)=Max{min(C ₁₁ ,C ₁₂ , . . . ,C _(1N)),min(C ₂₁ ,C ₂₂ , . . . ,C_(2N)), . . . ,min(C _(M1) ,C _(M2) , . . . ,C _(MN))}  (Equation 2)

C _(eff)=Max{max(C ₁₁ ,C ₁₂ , . . . ,C _(1N)),max(C ₂₁ ,C ₂₂ , . . . ,C_(2N)), . . . ,max(C _(M1) ,C _(M2) , . . . ,C _(MN))  (Equation 3)

C _(eff)=Min{min(C ₁₁ ,C ₁₂ , . . . ,C _(1N)),min(C ₂₁ ,C ₂₂ , . . . ,C_(2N)), . . . ,min(C _(M1) ,C _(M2) , . . . ,C _(MN))  (Equation 4)

In one or more embodiments, the effective measurement cycle periodicity,Ceff, is based on at least one of a minimum function and maximumfunction applied to a periodicity of the first measurement cycle and aperiodicity of the second measurement cycle. The various predefinedrules or functions listed above provide various advantages. For example,the rule based on the minimum function (Min{ }) ensures that the packetloss rate is minimized in which assuming or changing to a shortermeasurement cycle corresponds to lower packet loss; therefore, leadingto better system performance. In another example, the rule based on themaximum function (Max{ }) ensures that wireless device 14 powerconsumption is minimized in which assuming or changing to a longermeasurement cycle corresponds to a larger packet loss rate and allowswireless device 14 to change its receiver bandwidth more frequently. Inone or more embodiments, wireless device 14 can use shorter bandwidthwhen not doing measurement on SCC with deactivated SCells, thus savebattery power and lead to lower wireless device 14 battery consumption.

Examples of specific functions for deriving C_(eff) are discussed belowin which the specific functions correspond one or more specificconfigurations of system 10. In one example, a specific function forderiving C_(eff) is illustrated in Equation 5 where a CA capablewireless device 14 is configured with SCC₁ 18 and SCC₂ 20 with theirdeactivated SCells and only subset of measurement cycle types.

C _(eff)=max{max(C ₁₁ ,C ₁₂),max(C ₂₁ ,C ₂₂)}  (Equation 5)

Where:

-   -   C₁₁ is the periodicity of an SCell measurement cycle configured        at wireless device 14 by network node 12, e.g., serving eNode B,        for performing mobility measurements, e.g., RSRP/RSRQ, on one or        more cells of SCC₁ 18 with deactivated SCell, i.e., when a first        SCell is deactivated;    -   C₁₂ is the periodicity of PRS occasion when PRS configured at        wireless device 14 by network node 12, e.g. positioning node,        for performing positioning measurements, e.g., RSTD, on one or        more cells of SCC₁ 18 with deactivated SCell, i.e., when a first        SCell is deactivated;    -   C₂₁ is the periodicity of SCell measurement cycle configured at        wireless device 14 by network node 12, e.g., serving eNode B,        for performing mobility measurements, e.g., RSRP/RSRQ, on one or        more cells of SCC₂ with deactivated SCell, i.e., when a second        SCell is deactivated;    -   C₂₂ is the periodicity of PRS occasion when PRS is configured at        wireless device 14 by network node 12, e.g., positioning node,        for performing positioning measurements, e.g., RSTD, on one or        more cells of SCC₂ with deactivated SCell, i.e., when a second        SCell is deactivated.        In one embodiment, where C₁₁ and C₁₂ are each 640 ms each, and        C₂₁ and C₂₂ are 320 ms each, applying Equation 5, i.e., a        predefined rule, leads to an effective measurement cycle of 640        ms.

In another example of a specific function for deriving C_(eff) isdiscussed below with respect to Equation 6 where a CA capable wirelessdevice 14 is configured with SCC₁ 18 and SCC₂ 20 with their deactivatedSCells and only one type of measurement cycle type. wireless device 14is only configured for mobility measurements on SCC₁ and SCC₂.

C _(eff)=max {C ₁₁ ,C ₂₁}  (Equation 6)

Where:

-   -   C₁₁ is the periodicity of SCell measurement cycle configured at        wireless device 14 by network node 12, e.g. serving eNode B, for        performing mobility measurements, e.g. RSRP/RSRQ, on one or more        cells of SCC₁ with deactivated SCell, i.e., when a first SCell        is deactivated;    -   C₂₁ is the periodicity of SCell measurement cycle configured at        wireless device 14 by network node 12, e.g., serving eNode B,        for performing mobility measurements, e.g. RSRP/RSRQ, on one or        more cells of SCC₂ with deactivated SCell, i.e., when a second        SCell is deactivated.        In another example of a specific function for deriving C_(eff)        is discussed below with respect to Equation 7 where a CA capable        wireless device 14 is configured with SCC₁ and SCC₂ with their        deactivated SCells and configured only one type of measurement        cycle type on SCC₁ and another type of measurement cycle type on        SCC₂.

C _(eff)=max{C ₁₁ ,C ₂₂}  (Equation 7)

Where:

-   -   C₁₁ is the periodicity of SCell measurement cycle configured at        wireless device 14 by network node 12, e.g., serving eNode B,        for doing mobility measurements, e.g., RSRP/RSRQ, on one or more        cells of SCC₁ with deactivated SCell, i.e., when a first SCell        is deactivated;    -   C₂₂ is the periodicity of PRS occasion when PRS is configured at        wireless device 14 by network node 12, e.g. positioning node,        for performing positioning measurements, e.g. RSTD, on one or        more cells of SCC₂ with deactivated SCell, i.e., when a second        SCell is deactivated.        After determining C_(eff), processor 30 determines the effective        serving cell interruption probability (P_(eff)) based on the        C_(eff). For example, one or more predefined rules may be used        by processor 30 to map the determined C_(eff) to an interruption        impact measure, e.g., P_(eff), for the serving cell, e.g., PCell        and SCell(s), such that wireless device 14 can determine P_(eff)        for each of the serving cell(s) where interruption will occur        due to measurements on SCCs.

Several general examples of the mapping of Ceff to Peff that isperformed by processor 30 of wireless device 14 are discussed below withrespect to Tables 1-3. In particular, one or more predefined rules areapplied to the determine Ceff and at least one predefined threshold (H,H1, H2, etc.) to determine a P_(eff) based on which rule is satisfied.The at least one predefined threshold may correspond to a predefinedvalue from one or more telecommunication standards.

TABLE 1 Determination of P_(eff) from C_(eff) by wireless device 14based on predefined 2-level mapping Determination of P_(eff) by wirelessdevice Result of Measurement comparing C_(eff) with Determined cycle IDthreshold (H) P_(eff) 0 C_(eff) ≦ H P₁ 1 C_(eff) > H P₂

TABLE 2 Determination of P_(eff) from C_(eff) by wireless device 14based on predefined 3-level mapping Determination of P_(eff) by wirelessdevice Result of Measurement comparing C_(eff) with Determined cycle IDthresholds (H1 and H2) P_(eff) 0 C_(eff) ≦ H1 P₁ 1 H1 < C_(eff) ≦ H2 P₂2 C_(eff) > H2 P₃

TABLE 3 Determination of Peff from Ceff by wireless device 14 based onpredefined K-level mapping Determination of P_(eff) by wireless deviceResult of Measurement comparing C_(eff) with Determined cycle IDthresholds (H1 and H2) P_(eff) 0 C_(eff) ≦ H1 P₁ 1 H1 < C_(eff) ≦ H2 P₂. . . . . . . . . k − 1 C_(eff) > H_(k−1)  P_(K)Several specific examples of the mapping performed by processor 30 ofwireless device 14 are discussed below with respect to Tables 4-6.

TABLE 4 Determination of P_(eff) from C_(eff) by wireless device 14based on predefined 2-level mapping Determination of P_(eff) by wirelessdevice Result of Measurement comparing C_(eff) with Determined cycle IDthreshold (H) P_(eff) 0 C_(eff) ≦ 320 ms 0 1 C_(eff) > 320 0.5%

TABLE 5 Determination of P_(eff) from C_(eff) by wireless device 14based on predefined 2-level mapping: 2-level Determination of P_(eff) bywireless device Result of Measurement comparing C_(eff) with Determinedcycle ID threshold (H) P_(eff) 0 C_(eff) < 640 ms 0 1 C_(eff) ≧ 640 ms0.5%

TABLE 6 Determination of P_(eff) from C_(eff) by wireless device 14based on predefined 3-level mapping Determination of P_(eff) by wirelessdevice Result of Measurement comparing C_(eff) with Determined cycle IDthresholds (H1 and H2) P_(eff) 0 C_(eff) ≦ 320 ms 0% 1 320 ms < C_(eff)≦ 640 ms 0.5%  2 C_(eff) > 640 ms 1%

In other examples of predefined rules, it may be predefined that when atleast two SCCs with deactivated SCells are configured at wireless device14, the interruptions on the serving cell due to measurements on theSCCs with the deactivated SCells are allowed up to X % probability ofmissed at least one of ACK and NACK signaling where X is the largest ofthe probabilities of missed at least one of ACK and NACK signalingcorresponding to at least the first measurement cycle and the secondmeasurement cycles used for measuring cells of the SCC₁ and SCC₂,respectively.

Processor 30 of wireless device 14 is configured to ensure that whentransmitting packets between a serving cell and wireless device 14, aserving cell interruption probability of a missed at least one of ACKand NACK signaling in the UL direction does not exceed the determinedeffective serving cell interruption probability (P_(eff)) of a missed atleast one of ACK and NACK signaling in the UL direction while performingthe measurements on the cells of the first SCC and the second SCC (BlockS106). In one or more embodiments, ensuring that the serving cellinterruption probability of missed at least one of ACK and NACKsignaling in the UL direction does not exceed the determined effectiveserving cell interruption probability (P_(eff)) of missed at least oneof ACK and NACK signaling includes processor 30 adapting at least oneradio procedure to be performed by the wireless device. For example,wireless device 14 adapting at least one radio procedure may include atleast one of:

-   -   performing measurements or obtaining measurement samples for        measuring on one or more cells of different SCCs with at least        deactivated SCells around the same time, e.g., within X ms of        each other where X=2 or 3 ms, or during the same time instance,        i.e., modifying a measurement sampling of measurements performed        on the cells by performing the measurements using first and        second measurement cycles during a same time period;    -   performing measurements or obtaining measurement samples for        measuring on one or more cells of different SCCs according to        only the effective measurement cycle, e.g., longest of the        measurement cycles used for all SCCs, i.e., modifying a        measurement sampling of measurements performed on the cells by        performing the measurements according to only an effective        measurement cycle, Ceff, the Ceff being based on the first        measurement cycle and the second measurement cycle;    -   adapting measurement reporting in time since transmission may        also cause interruption;    -   adapting UL radio signal or channel transmission, e.g., adapt        SRS or RACH transmission, where the adapting may include one or        more of: adapting UL transmission configuration in time,        dropping some of the configured transmissions to avoid the        interruption they may cause; and    -   aligning the interruptions caused by the at least two        measurement cycles in time, e.g., by adapting a time shift of at        least one measurement cycle with respect to another one or of at        least two measurement cycles with respect to each other.        In one or more embodiments, the measurements according to the        effective measurement cycle, Ceff, are performed such that        measurements on the first SCC are performed one of just before,        simultaneously with and just after measurements on the second        SCC.

Since some of the deactivated SCell measurement cycle configurations aremultiples of other DRX cycle configurations, (C1=N×C1 or C2=N×C1), theinterruptions may be aligned by performing measurements on deactivatedSCC₁ 18 around the same time as every Nth measurement on deactivatedSCC₂ 20, or performing measurements on the deactivated SCC₂ 20 aroundthe same time as every Nth measurement on C1. Alternatively, wirelessdevice 14 may measure according to the most demanding measurement cycleC_(eff)=Min (C1, C2) and use a suitable L1 filter to ensure the correctL1 measurement period for the other measurement cycle. For example, ifC₁=160 ms and C₂=256 ms, the wireless device measures on both SCC₁ andSCC₂ according to a 160 ms measurement cycle. The L1 filtering isperformed on five samples for SCC₁ and for eight samples on SCC₂, suchthat the measurement periods are 800 ms and 1280 ms, respectively. Inthis case, SCC₂ is measured more frequently than the minimum required bythe C₂ measurement cycle to align the measurement activity between C₁and C₂. Then, additional filtering is performed on C₂ to ensure that thespecification measurement period is still met.

For the existing values defined for Scell measurement cycles (subframes(sf) 160, sf 256, sf 320, sf 512, sf 640, sf 1024, sf 1280) the ratio ofdeactivated SCell measurement cycles are all ratios as illustrates belowin Table 7.

Deactivated SCell measurement cycle 2 (C2) (ms) 160 256 320 512 640 10241280 Deacti- 160 1 1.6 2 3.2 4 6.4 8 vated 256 0.625 1 1.25 2 2.5 4 5SCell 320 0.5 0.8 1 1.6 2 3.2 4 measure- 512 0.3125 0.5 0.625 1 1.25 22.5 ment 640 0.25 0.4 0.5 0.8 1 1.6 2 cycle 1024 0.15625 0.25 0.3125 0.50.625 1 1.25 1 (C1) 1280 0.125 0.2 0.25 0.4 0.5 0.8 1 (ms)

-   -   Table 7 of ratios of deactivated SCell measurements cycles

An exemplary signaling flow diagram for a processor performed by secondprocedure adapter module 25 is illustrated in FIG. 4. Wireless device 14performs functions according to second procedure adapter module 25 whenCA capable wireless device 14 is configured with only one SCC withdeactivated SCell and the remaining SCCs with activated SCell. Thiswireless device 14 configuration is referred to as a fall back mode ofoperation or first mode of operation. Processor 30 is configured todetermine at least the first measurement cycle with which wirelessdevice 14 is configured to measure on the cells of the SCC with thedeactivated SCell (Block S108). Processor 30 is configured to determineat least one serving cell interruption requirement from the determinedat least the first measurement cycle based on a pre-defined relationbetween the at least one serving cell interruption requirement and theat least the first measurement cycle (Block S110). Processor 30 isconfigured to ensure the serving cell interruption probability of missedat least one of ACK and NACK signaling does not exceed the at least oneserving cell interruption requirement when performing measurements oncells of SCCs with deactivated SCells (Block S112). In one or moreembodiments, the ensuring that the serving cell interruption probabilityof missed at least one of ACK and NACK signaling does not exceed the atleast one serving cell interruption requirement includes adapting atleast one procedure as discussed above with respect to Block S106.

In one or more embodiments, the wireless device is served by only thePCell and is one of configured and reconfigured with only the first SCC.Processor 30 may be configured to determine a second effective servingcell interruption probability, Peff2, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inan uplink, UL, direction based on the first measurement cycle, andensure that when transmitting packets between a serving cell and thewireless device, a serving cell interruption probability of a missed atleast one of ACK and NACK signaling in the UL direction does not exceedthe determined second effective serving cell interruption probability,Peff2, of a missed at least one of ACK and NACK signaling in the ULdirection while performing the measurements on the cells of the firstSCC. Further, the first measurement cycle and the second measurementcycles are any of: a first SCell measurement cycle and a second SCellmeasurement cycle used by the wireless device for performing mobilitymeasurements, and a first Positioning Reference Signal, PRS,configuration periodicity and a second PRS configuration periodicityused by the wireless device for performing positioning measurements

In one or more embodiments where wireless device 14 is capable of 3 DLCA and is configured with 2 SCCs, the predefined rule for wirelessdevice 14 is as follows:

-   -   when only one SCell is activated, then the interruptions on the        PCell and the activated SCell due to measurements on SCC with        the deactivated SCell are allowed with up to X1% probability of        missed at least one of ACK and NACK signaling when the        configured measCycleSCell is Y1 ms or longer for the deactivated        SCell;    -   if both SCells are deactivated then the interruptions on the        PCell due to measurements on the SCCs with the deactivated        SCells are allowed up to X2% probability of missed at least one        of ACK and NACK provided that the configured measCycleSCell is        Y2 ms or longer for at least one deactivated SCell,        where X1=X2=0.5% and Y1=Y2=640 ms, and measCycleSCell is defined        3GPP standards.

An exemplary block diagram of network node 12 is illustrated in FIG. 5.Network node 12 may be an eNodeB, RNC, BSC or positioning node, amongother node devices. Network node 12 includes transmitter 34 and receiver36 for communicating with wireless device 14 and other network nodes 12,among other devices. Alternatively, transmitter 12 and receiver 36 maybe one or more transceivers. In one or more embodiments, network node 12may include one or more communication interfaces for communicating withone or more logical nodes. Network node 12 includes one or moreprocessors 38 for performing network node 12 functions as describedherein. Network node 12 includes memory 40 in communication withprocessor 38 in which memory 32 may store one or more modules,programming instructions and data. In one or more embodiments, memory 40stores measurement cycle adaptor module 22. For example, measurementcycle adaptor module 22 includes program instructions, which whenexecuted by processor 38, cause processor 38 to perform the functionsdescribed in detail with respect to FIG. 6.

An exemplary signaling flow diagram of a process performed bymeasurement cycle adaptor module 22 is illustrated in FIG. 6. Processor38 is configured to determine a threshold of a serving cell interruptionprobability (Peff) of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink direction allowedby wireless device 14 when measuring in cells of at least two secondarycomponent carriers, SCCs, with deactivated secondary cells, SCells,using respective measurement cycles (Block S114). Processor 38 isfurther configured to ensure that the serving cell interruptionprobability (Peff) of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in the uplink channel is belowthe threshold (Block S116). The at least one measurement cycle is aduration in which wireless device 14 performs measurements on at leastone cell of at least two SCCs. In one or more embodiments, the ensuringfunctions of measurement cycle adaptor module 22 include adapting,modifying or reconfigure at least measurement cycle. In one embodiment,at least one parameter associated with at least one measurement cycle ismodified in which the at least one parameter includes at least one of aperiodicity of the measurement cycle and a time offset of themeasurement cycle. The at least one measurement cycle may include a CAmeasurement cycle such as a SCell measurement cycle and othermeasurements such as RSTS, e.g., RSTD measurement configuration receivedin the OTDOA assistance data by wireless device 14 from network node 12.

For example, at least one of a second network node and a third networknode adapts or modifies the first and the second measurement cyclesrespectively for wireless device 14 that is configured with the at leasttwo SCCs (SCC₁ 18 and SCC₂ 20) with deactivated SCells. This adaptationor modification ensures that determined level of serving cellperformance is met for the PCell and/or for one or more activatedSCells. The determined level of the serving cell performance maycorrespond to interruption impact measure, e.g., certain packet lossrate or serving cell interruption probability of missed at least one ofACK and NACK signalling. For example, network node 12 including bothsecond and third network nodes may configure the measurement cycles forthe respective SCCs that would ensure that the serving cell interruptionprobability of missed at least one of ACK and NACK for PCell and/orSCells is below or equal to a certain threshold, i.e., determined level,such as not larger than 0.5%. The threshold can be determined based onthe acceptable level of the serving cell interruption probability ofmissed at least one of ACK and NACK.

In one or more embodiments, in order to determine how to adapt at leastone measurement cycle, processor 38 obtains information related to oneor more predefined rules described with respect to Block S104. Theobtained information may include Peff and/or Ceff, thereby allowingnetwork node 12 determine the impact of using different measurementcycles on the serving cell performance. Further, processor 38 determinesat least one measurement cycle that ensures the serving cellinterruption probability of missed at least one ACK and NACK signalingin the UL direction is below the threshold. For example, processor 38determines a periodicity, time offset in measurement configurationand/or other parameters of one or more measurement cycles. Processor 38then selects the determined at least one measurement cycle ormodifies/adapts the measurement cycle to the determined measurementcycle in order to ensure that the serving cell interruption probabilityof missed at least one of ACK and NACK for PCell and/or SCells is belowor equal to a certain threshold.

In one or more embodiment, network node 12 determines an effectivemeasurement cycle, Ceff, based on the measurement cycles, determines aserving cell interruption probability, Peff, based on the effectivemeasurement cycle, Ceff, in which the modified at least one measurementcycle is based on the determined serving cell interruption probability,Peff. The effective measurement cycle periodicity, Ceff, is based on atleast one of a minimum function and maximum function applied to themeasurement cycles. Further, the determining of the serving cellprobability, Peff, may include mapping the effective measurement cycleperiodicity, Ceff, to a predefined serving cell interruptionprobability, Peff. In one or more embodiment, the at least onemeasurement cycle is any of: a SCell measurement cycle used by thewireless device for performing mobility measurements, and a PRSconfiguration periodicity used by the wireless device for performingpositioning measurements.

An exemplary alternative embodiment of wireless device 14 is illustratedin FIG. 7. In particular, wireless device 14 includes receiver module 42that is configured to perform the functions of Blocks S100 and S102 asdescribed above. Further, wireless device 14 includes adaptor module 44that is configured to perform the functions of Blocks S104 and S106 asdescribed above. An exemplary alternative embodiment of network node 12is illustrated in FIG. 8. Network node 12 includes measurementconfiguration module 48 that is configured to perform the functions ofBlocks S114 and 116.

In the following some exemplary embodiments of the teaching describedherein are explained.

APPENDIX A

7.8 Interruptions with Carrier Aggregation

7.8.1 Introduction

This section contains the requirements related to the interruptions on:

-   -   PCell that are allowed for a E-UTRA CA capable UE when one or        two SCells are configured, deconfigured, activated or        deactivated or    -   PCell and a SCell that are allowed for a E-UTRA CA capable UE        when the other SCell is configured, deconfigured, activated or        deactivated.        Note: interruptions at SCell addition/release,        activation/deactivation and during measurements on SCC may not        be required by all UEs.        Editor's Note: The interruptions shall not interrupt RRC        signalling or ACK/NACKs related to RRC reconfiguration procedure        [2] for SCell addition/release or MAC control signalling        [36.321] for SCell activation/deactivation command. How to        specify this is FFS.

7.8.2 Requirements

7.8.2.1 Interruptions at SCell addition/release for intra-band CAWhen an intra-band SCell is added or released as defined in [2] the UEis allowed an interruption of up to 5 subframes on PCell during the RRCreconfiguration procedure [2]. This interruption is for both uplink anddownlink of PCell.7.8.2.2 Interruptions at SCell addition/release for inter-band CA Whenan inter-band SCell is added or released as defined in [2] the UE thatrequires interrupt is allowed an interruption of up to [1] subframe onPCell during the RRC reconfiguration procedure [2]. This interruption isfor both uplink and downlink of PCell.7.8.2.3 Interruptions at SCell activation/deactivation for intra-band CAWhen an intra-band SCell is activated or deactivated as defined in [2]the UE is allowed an interruption of up to 5 subframes on PCell duringthe activation/deactivation procedure [2] delay—defined in Section 7.7.This interruption is for both uplink and downlink of PCell.7.8.2.4 Interruptions at SCell activation/deactivation for inter-band CAWhen an inter-band SCell is activated or deactivated as defined in [2]the UE that requires interrupt is allowed an interruption of up to [1]subframe on PCell during the activation/deactivation procedure[2]—defined in Section 7.7. This interruption is for both uplink anddownlink of PCell.7.8.2.5 Interruptions during measurements on SCC for intra-band CAPCell interruptions due to measurements on SCC when the SCell isdeactivated are allowed with up to 0.5% probability of missed ACK/NACKwhen the configured measCycleSCell[2] is 640 ms or longer. Eachinterruption shall not exceed 5 subframes.7.8.2.6 Interruptions during measurements on SCC for inter-band CAPCell interruptions due to measurements on SCC when the SCell isdeactivated are allowed with up to 0.5% probability of missed ACK/NACKwhen the configured measCycleSCell[2] is 640 ms or longer. Eachinterruption shall not exceed 1 subframe.7.8.2.7 Interruptions at SCell addition/release for intra-band CA withtwo downlink SCellsWhen an intra-band SCell is added or released as defined in [2] the UEis allowed an interruption of up to 5 subframes on PCell and the otheractivated SCell during the RRC reconfiguration procedure [2]. Thisinterruption is for both uplink and downlink of PCell and the otheractivated SCell.7.8.2.8 Interruptions at SCell addition/release for inter-band CA withtwo downlink SCellsWhen an inter-band SCell is added or released as defined in [2] the UEthat requires interrupt is allowed an interruption of up to [1] subframeon PCell and the other activated SCell during the RRC reconfigurationprocedure [2]. This interruption is for both uplink and downlink ofPCell and the other activated SCell.7.8.2.9 Interruptions at SCell addition/release for combined intra-bandand inter-band CA with two downlink SCellsWhen a SCell is added or released as defined in [2] the UE is allowed aninterruption:

-   -   on PCell according to section 7.8.2.7 provided that the SCell        and the PCell are in the same frequency band or according to        section 7.8.2.8 provided that the SCell and the PCell are in        different frequency bands, and    -   on the other activated SCell according to section 7.8.2.7        provided that both SCells are in the same frequency band or        according to section 7.8.2.8 provided that the two SCells are in        different frequency bands.        This interruption is for both uplink and downlink of PCell and        the other activated SCell.        7.8.2.10 Interruptions at SCell activation/deactivation for        intra-band CA with two downlink SCells        When an intra-band SCell is activated or deactivated as defined        in [17] the UE is allowed an interruption of up to 5 subframes        on PCell and the other activated SCell during the        activation/deactivation delay defined in Section 7.7. This        interruption is for both uplink and downlink of PCell and the        other activated SCell.        7.8.2.11 Interruptions at SCell activation/deactivation for        inter-band CA with two downlink SCells        When an inter-band SCell is activated or deactivated as defined        in [17] the UE that requires interruption is allowed an        interruption of up to [1] subframe on PCell and the other        activated SCell during the activation/deactivation dlay defined        in Section 7.7. This interruption is for both uplink and        downlink of PCell and the other activated SCell.        7.8.2.12 Interruptions at SCell activation/deactivation for        combined intra-band and inter-band CA with two downlink SCells        When a SCell is activated or deactivated as defined in [17] the        UE is allowed an interruption:    -   on PCell according to section 7.8.2.10 provided that the SCell        and the PCell are in the same frequency band or according to        section 7.8.2.11 provided that the SCell and the PCell are in        different frequency bands, and    -   on the other activated SCell according to section 7.8.2.10        provided that both SCells are in the same frequency band or        according to section 7.8.2.11 provided that the two SCells are        in different frequency bands.        This interruption is for both uplink and downlink of PCell and        the other activated SCell.        7.8.2.13 Interruptions during measurements on SCC for intra-band        CA with two downlink SCells        If only one SCell is activated then the interruptions on the        PCell and the activated SCell due to measurements on SCC with        the deactivated SCell are allowed with up to 0.5% probability of        missed ACK/NACK when the configured measCycleSCell [2] is 640 ms        or longer for the deactivated SCell.        If both SCells are deactivated then the interruptions on the        PCell due to measurements on the SCCs with the deactivated        SCells are allowed up to 0.5% probability of missed ACK/NACK        provided that the configured measCycleSCell [2] is 640 ms or        longer for at least one deactivated SCell.        Each interruption shall not exceed 5 subframes.        7.8.2.14 Interruptions during measurements on SCC for inter-band        CA with two downlink SCells        If only one SCell is activated then the interruptions on the        PCell and the activated        SCell due to measurements on SCC with the deactivated SCell are        allowed with up to 0.5% probability of missed ACK/NACK when the        configured measCycleSCell [2] is 640 ms or longer for the        deactivated SCell.        If both SCells are deactivated then the interruptions on the        PCell due to measurements on the SCCs with the deactivated        SCells are allowed up to 0.5% probability of missed ACK/NACK        provided that the configured measCycleSCell [2] is 640 ms or        longer for at least one deactivated SCell.        Each interruption shall not exceed 1 subframe.        7.8.2.15 Interruptions during measurements on SCC for combined        intra-band and inter-band CA with two downlink SCells        The UE shall meet the PCell interruption requirements according        to section 7.8.2.13 provided that the PCell and at least one of        the deactivated SCells are in the same frequency band.        The UE shall meet the PCell interruption requirements according        to section 7.8.2.14 provided that the PCell and the two        deactivated SCells are in different frequency bands.        The UE shall meet the interruption requirements for an activated        SCell according to section 7.8.2.13 provided that the activated        SCell and the deactivated SCell are in the same frequency band.        The UE shall meet the interruption requirements for an activated        SCell according to section 7.8.2.14 provided that the activated        SCell and the deactivated SCell are in different frequency        bands.

APPENDIX B 7.1 UE Transmit Timing 7.1.1 Introduction

The UE shall have capability to follow the frame timing change of theconnected eNode B. The uplink frame transmission takes place(N_(TA)+N_(TA offset))×T_(s) before the reception of the first detectedpath (in time) of the corresponding downlink frame from the referencecell. The UE shall be configured with a pTAG containing the PCell. ThepTAG may also contain one SCell or two SCells, if configured. The UEcapable of supporting multiple timing advance [2] may also be configuredwith one sTAG, in which case:

-   -   the pTAG shall contain one PCell and the sTAG shall contain one        SCell with configured uplink or    -   the pTAG shall contain one PCell and the sTAG shall contain two        SCells with configured uplink    -   the pTAG shall contain one PCell and one SCell and the sTAG        shall contain one SCell with configured uplink        In pTAG, UE shall use the PCell as the reference cell for        deriving the UE transmit timing for cells in the pTAG. When the        UE capable of supporting multiple timing advance [2] is        configured with an sTAG, the UE shall use the activated SCell        from the sTAG for deriving the UE transmit timing for cell in        the sTAG. UE initial transmit timing accuracy, maximum amount of        timing change in one adjustment, minimum and maximum adjustment        rate are defined in the following requirements. The requirements        in clause 7 apply to both TAGs.

7.7 SCell Activation and Deactivation Delay for E-UTRA CarrierAggregation 7.7.1 Introduction

This section defines requirements for the delay within which the UEshall be able to activate a deactivated SCell and deactive an activatedSCell in E-UTRA carrier aggregation. The requirements are applicable toan E-UTRA carrier aggregation capable UE which has been configured withone downlink SCell or two downlink SCells. The requirements shall applyfor both E-UTRA FDD and TDD.

7.7.2 SCell Activation Delay Requirement for Deactivated SCell

The requirements in this section shall apply for the UE configured withone downlink SCell.The delay within which the UE shall be able to activate the deactivatedSCell depends upon the specified conditions.Upon receiving SCell activation command in subframe n, the UE shall becapable to transmit valid CSI report and apply actions related to theactivation command as specified in [17] for the SCell being activated nolater than in subframe n+24 provided the following conditions are metfor the SCell:

-   -   During the period equal to max([5] measCycleSCell, [5] DRX        cycles) before the reception of the SCell activation command:    -   the UE has sent a valid measurement report for the SCell being        activated and    -   the SCell being activated remains detectable according to the        cell identification conditions specified in section 8.3.3.2,    -   SCell being activated also remains detectable during the SCell        activation delay according to the cell identification conditions        specified in section 8.3.3.2.        Otherwise upon receiving the SCell activation command in        subframe n, the UE shall be capable to transmit valid CSI report        and apply actions related to the activation command as specified        in [17] for the SCell being activated no later than in subframe        n+34 provided the SCell can be successfully detected on the        first attempt.        If there is no reference signal received for the CSI measurement        over the delay corresponding to the minimum requirements        specified above, then the UE shall report corresponding valid        CSI for the activated SCell on the next available uplink        reporting resource after receiving the reference signal.        If there are no uplink resources for reporting the valid CSI in        subframe n+24 or n+34 then the UE shall use the next available        uplink resource for reporting the corresponding valid CSI.        The valid CSI is based on the UE measurement and corresponds to        any CQI value specified in [3] with the exception of CQI index=0        (out of range) provided:    -   the conditions in section 7.7 are met over the entire SCell        activation delay and    -   the conditions for CQI reporting defined in Section 7.2.3 [3]        are met.        In addition to CSI reporting defined above, UE shall also apply        other actions related to the activation command specified in        [17] for an SCell at the first opportunities for the        corresponding actions once the SCell is activated.        The PCell interruption specified in section 8.3.3 shall not        occur before subframe n+5 and not occur after subframe n+9 for        E-UTRA FDD.        The PCell interruption specified in section 8.3.3 shall not        occur before subframe n+5 and not occur after subframe n+11 for        E-UTRA TDD.        Starting from subframe n+9 for E-UTRA FDD UE or subframe n+11        for E-UTRA TDD UE and until the UE has completed the SCell        activation, the UE shall send CSI with CQI index=0 (out of        range) if the UE is configured to report the CQI in SCell.

7.7.3 SCell Deactivation Delay Requirement for Activated SCell

The requirements in this section shall apply for the UE configured withone downlink SCell.Upon receiving SCell deactivation command or upon expiry of thesCellDeactivationTimer in subframe n, the UE shall accomplish thedeactivation actions specified in [17] for the SCell being deactivatedno later than in subframe n+8.The PCell interruption specified in section 8.3.3 shall not occur beforesubframe n+5 and not occur after subframe n+9 for E-UTRA FDD.The PCell interruption specified in section 8.3.3 shall not occur beforesubframe n+5 and not occur after subframe n+11 for E-UTRA TDD.7.7.4 SCell Activation Delay Requirement for Deactivated SCell with TwoDownlnk SCellsThe requirements in this section shall apply for the UE configured withtwo downlink SCells.While activating a SCell if the other SCell is not activated ordeactivated during the SCell activation delay then the UE shall meet theSCell activation delay requirements specified in section 7.7.2.While activating a SCell if the other SCell is activated or deactivatedthen the UE shall meet the SCell activation delay requirements(T_(activate total)) according to the following expression:

T _(activate) _(_) _(total) =T _(activate) _(_) _(basic) +K*D_(interrupt) +K*Δ

Where:

T_(activate) _(_) _(basic) is the SCell activation delay specified insection 7.7.2;K is the number of times the other SCell is activated, deactivated,configured or deconfigured while the SCell is being activated;D_(interrupt) is the maximum of the PCell and SCell interruption timesspecified in section 7.8.Δ is the margin to account for resuming the SCell deactivation aftereach interruption.7.7.5 SCell Deactivation Delay Requirement for Activated SCell with TwoDownlink SCellsThe requirements in this section shall apply for the UE configured withtwo downlink SCells.While deactivating a SCell if the other SCell is not activated ordeactivated during the SCell deactivation delay then the UE shall meetthe SCell deactivation delay requirements specified in section 7.7.3.While deactivating a SCell if the other SCell is activated ordeactivated then the UE shall meet the SCell activation delayrequirements (T_(deactivate) _(_) _(total)) according to the followingexpression:

T _(deactivate) _(_) _(total) =T _(deactivate) _(_) _(basic) +L*D_(interrupt) +L*Δ

Where:

T_(deactivate) _(_) _(basic) is the SCell activation delay specified insection 7.7.3;L is the number of times the other SCell is activated, deactivated,configured or deconfigured while the SCell is being activated;D_(interrupt) is the maximum of the PCell and SCell interruptionsspecified in section 7.8.Δ is the margin to account for resuming the SCell deactivation aftereach interruption.7.8 Interruptions with Carrier Aggregation

7.8.1 Introduction

This section contains the requirements related to the interruptions on:

-   -   PCell that are allowed for a E-UTRA CA capable UE when one or        two SCells are configured, deconfigured, activated or        deactivated or    -   PCell and a SCell that are allowed for a E-UTRA CA capable UE        when the other SCell is configured, deconfigured, activated or        deactivated.        Note: interruptions at SCell addition/release,        activation/deactivation and during measurements on SCC may not        be required by all UEs.        Editor's Note: The interruptions shall not interrupt RRC        signalling or ACK/NACKs related to RRC reconfiguration procedure        [2] for SCell addition/release or MAC control signalling        [36.321] for SCell activation/deactivation command. How to        specify this is FFS.

7.8.2 Requirements

7.8.2.1 Interruptions at SCell addition/release for intra-band CAWhen an intra-band SCell is added or released as defined in [2] the UEis allowed an interruption of up to 5 subframes on PCell during the RRCreconfiguration procedure [2]. This interruption is for both uplink anddownlink of PCell.7.8.2.2 Interruptions at SCell addition/release for inter-band CAWhen an inter-band SCell is added or released as defined in [2] the UEthat requires interrupt is allowed an interruption of up to [1] subframeon PCell during the RRC reconfiguration procedure [2]. This interruptionis for both uplink and downlink of PCell.7.8.2.3 Interruptions at SCell activation/deactivation for intra-band CAWhen an intra-band SCell is activated or deactivated as defined in [2]the UE is allowed an interruption of up to 5 subframes on PCell duringthe activation/deactivation procedure [2] delay—defined in Section 7.7.This interruption is for both uplink and downlink of PCell.7.8.2.4 Interruptions at SCell activation/deactivation for inter-band CAWhen an inter-band SCell is activated or deactivated as defined in [2]the UE that requires interrupt is allowed an interruption of up to [1]subframe on PCell during the activation/deactivation procedure[2]—defined in Section 7.7. This interruption is for both uplink anddownlink of PCell.7.8.2.5 Interruptions during measurements on SCC for intra-band CAPCell interruptions due to measurements on SCC when the SCell isdeactivated are allowed with up to 0.5% probability of missed ACK/NACKwhen the configured measCycleSCell[2] is 640 ms or longer. Eachinterruption shall not exceed 5 subframes.7.8.2.6 Interruptions during measurements on SCC for inter-band CAPCell interruptions due to measurements on SCC when the SCell isdeactivated are allowed with up to 0.5% probability of missed ACK/NACKwhen the configured measCycleSCell[2] is 640 ms or longer. Eachinterruption shall not exceed 1 subframe.7.8.2.7 Interruptions at SCell addition/release for intra-band CA withtwo downlink SCellsWhen an intra-band SCell is added or released as defined in [2] the UEis allowed an interruption of up to 5 subframes on PCell and the otheractivated SCell during the RRC reconfiguration procedure [2]. Thisinterruption is for both uplink and downlink of PCell and the otheractivated SCell.7.8.2.8 Interruptions at SCell addition/release for inter-band CA withtwo downlink SCellsWhen an inter-band SCell is added or released as defined in [2] the UEthat requires interrupt is allowed an interruption of up to [1] subframeon PCell and the other activated SCell during the RRC reconfigurationprocedure [2]. This interruption is for both uplink and downlink ofPCell and the other activated SCell.7.8.2.9 Interruptions at SCell addition/release for combined intra-bandand inter-band CA with two downlink SCellsWhen a SCell is added or released as defined in [2] the UE is allowed aninterruption:

-   -   on PCell according to section 7.8.2.7 provided that the SCell        and the PCell are in the same frequency band or according to        section 7.8.2.8 provided that the SCell and the PCell are in        different frequency bands, and    -   on the other activated SCell according to section 7.8.2.7        provided that both SCells are in the same frequency band or        according to section 7.8.2.8 provided that the two SCells are in        different frequency bands.        This interruption is for both uplink and downlink of PCell and        the other activated SCell.        7.8.2.10 Interruptions at SCell activation/deactivation for        intra-band CA with two downlink SCells        When an intra-band SCell is activated or deactivated as defined        in [17] the UE is allowed an interruption of up to 5 subframes        on PCell and the other activated SCell during the        activation/deactivation delay defined in Section 7.7. This        interruption is for both uplink and downlink of PCell and the        other activated SCell.        7.8.2.11 Interruptions at SCell activation/deactivation for        inter-band CA with two downlink SCells        When an inter-band SCell is activated or deactivated as defined        in [17] the UE that requires interruption is allowed an        interruption of up to [1] subframe on PCell and the other        activated SCell during the activation/deactivation dlay defined        in Section 7.7. This interruption is for both uplink and        downlink of PCell and the other activated SCell.        7.8.2.12 Interruptions at SCell activation/deactivation for        combined intra-band and inter-band CA with two downlink SCells        When a SCell is activated or deactivated as defined in [17] the        UE is allowed an interruption:    -   on PCell according to section 7.8.2.10 provided that the SCell        and the PCell are in the same frequency band or according to        section 7.8.2.11 provided that the SCell and the PCell are in        different frequency bands, and    -   on the other activated SCell according to section 7.8.2.10        provided that both SCells are in the same frequency band or        according to section 7.8.2.11 provided that the two SCells are        in different frequency bands.        This interruption is for both uplink and downlink of PCell and        the other activated SCell.        7.8.2.13 Interruptions during measurements on SCC for intra-band        CA with two downlink SCells        If only one SCell is activated then the interruptions on the        PCell and the activated SCell due to measurements on SCC with        the deactivated SCell are allowed with up to 0.5% probability of        missed ACK/NACK when the configured measCycleSCell [2] is 640 ms        or longer for the deactivated SCell.        If both SCells are deactivated then the interruptions on the        PCell due to measurements on the SCCs with the deactivated        SCells are allowed up to 0.5% probability of missed ACK/NACK        provided that the configured measCycleSCell [2] is 640 ms or        longer for at least one deactivated SCell.        Each interruption shall not exceed 5 subframes.        7.8.2.14 Interruptions during measurements on SCC for inter-band        CA with two downlink SCells        If only one SCell is activated then the interruptions on the        PCell and the activated SCell due to measurements on SCC with        the deactivated SCell are allowed with up to 0.5% probability of        missed ACK/NACK when the configured measCycleSCell [2] is 640 ms        or longer for the deactivated SCell.        If both SCells are deactivated then the interruptions on the        PCell due to measurements on the SCCs with the deactivated        SCells are allowed up to 0.5% probability of missed ACK/NACK        provided that the configured measCycleSCell [2] is 640 ms or        longer for at least one deactivated SCell.        Each interruption shall not exceed 1 subframe.        7.8.2.15 Interruptions during measurements on SCC for combined        intra-band and inter-band CA with two downlink SCells        The UE shall meet the PCell interruption requirements according        to section 7.8.2.13 provided that the PCell and at least one of        the deactivated SCells are in the same frequency band.        The UE shall meet the PCell interruption requirements according        to section 7.8.2.14 provided that the PCell and the two        deactivated SCells are in different frequency bands.        The UE shall meet the interruption requirements for an activated        SCell according to section 7.8.2.13 provided that the activated        SCell and the deactivated SCell are in the same frequency band.        The UE shall meet the interruption requirements for an activated        SCell according to section 7.8.2.14 provided that the activated        SCell and the deactivated SCell are in different frequency        bands.        In the following some exemplary embodiments of the teaching        described herein are explained.

EMBODIMENTS Embodiment 1

A method in a wireless device, served by a first network node on aprimary cell, PCell, the wireless device being capable of using at leasttwo secondary serving cells, SCells, the method comprising:

receiving a first request to perform a measurement on at least one cellon a first secondary component carrier, SCC, with a deactivated firstSCell using at least a first measurement cycle;

receiving a second request to perform a measurement on at least one cellon a second SCC with a deactivated second SCell using at least a secondmeasurement cycle;

determining an effective serving cell interruption probability (Peff) ofmissed ACK/NACK signals in an uplink, UL, based on at least the firstmeasurement cycle and the second measurement cycle; and

adapting a procedure to ensure that when transmitting packets between aserving cell and the wireless device, a serving cell interruptionprobability of missed ACK/NACK in the UL does not exceed the determinedeffective serving cell interruption probability, Peff, of missedACK/NACK in the UL while performing the measurements on the cells of thefirst SCC and the second SCC.

Embodiment 2

The method of Embodiment 1, wherein the serving cell is one of the PCelland one or more activated SCells.

Embodiment 3

The method of Embodiment 1, wherein Peff is the max of P1 and P2 whereP1 and P2 are interruption probabilities of missed ACK/NACKcorresponding to the first and the second measurement cycles.

Embodiment 4

The method of Embodiment 1, wherein adapting the procedure comprisesadapting a measurement sampling of measurements performed on the cellsand performing the measurements using first and second measurementcycles during the same time period.

Embodiment 5

The method of Embodiment 1, wherein the first and the second requestsare received from a second network node and a third network node,respectively.

Embodiment 6

The method of Embodiment 5, wherein the first, second, and third networknodes are co-located at the same site.

Embodiment 7

The method of Embodiment 1, wherein the first and the second requestsare received in a same message.

Embodiment 8

A method in a network node, the method comprising:

determining a threshold, Pthresh, of a serving cell interruptionprobability, Peff, of missed ACK/NACK in an uplink signal allowed by awireless device when measuring in cells of at least two secondarycomponent carriers, SCC, with deactivated secondary cells, SCells, usingrespective measurement cycles; and

adapting at least one measurement cycle based on at least onepre-defined rule, the at least one measurement cycle being a duration inwhich the wireless device performs measurements on at least one cell ofat least two SCCs, such that a serving cell interruption probability ofmissed ACK/NACK in the uplink signal caused by the wireless deviceremains below the determined threshold, Pthresh.

Embodiment 9

A wireless device, served by a first network node on a primary cell,PCell, the wireless device being capable of using at least two secondaryserving cells, SCells, the wireless device comprising:

a receiver module configured to receive:

-   -   a first request to perform a measurement on at least one cell on        a first secondary component carrier, SCC, with a deactivated        first SCell using at least a first measurement cycle; and    -   a second request to perform a measurement on at least one cell        on a second SCC with a deactivated second SCell using at least a        second measurement cycle;

a probability determiner module configured to determine an effectiveserving cell interruption probability (Peff) of missed ACK/NACK signalsin an uplink, UL, based on at least the first measurement cycle and thesecond measurement cycle; and

a procedure adapter module configured to adapt a procedure to ensurethat when transmitting packets between a serving cell and the wirelessdevice, a serving cell interruption probability of missed ACK/NACK inthe UL does not exceed the determined effective serving cellinterruption probability, Peff, of missed ACK/NACK in the UL whileperforming the measurements on the cells of the first SCC and the secondSCC.

Embodiment 10

A network node, comprising:

a threshold determiner module configured to determine a threshold,Pthresh, of a serving cell interruption probability, Peff, of missedACK/NACK in an uplink signal allowed by a wireless device when measuringin cells of at least two secondary component carriers, SCC, withdeactivated secondary cells, SCells, using respective measurementcycles; and

-   -   a measurement cycle adaptor module configured to adapt at least        one measurement cycle based on at least one pre-defined rule,        the at least one measurement cycle being a duration in which the        wireless device performs measurements on at least one cell of at        least two SCCs, such that a serving cell interruption        probability of missed ACK/NACK in the uplink signal caused by        the wireless device remains below the determined threshold,        Pthresh.

Embodiment 11

A wireless device, served by a first network node on a primary cell,PCell, the wireless device being capable of using at least two secondaryserving cells, SCells, the wireless device comprising:

a memory configured to store:

-   -   measurement cycle durations;    -   an effective serving cell interruption probability, Peff; and

a processor configured to:

-   -   receive a first request to perform a measurement on at least one        cell on a first secondary component carrier, SCC, with a        deactivated first SCell using at least a first measurement        cycle;    -   receive a second request to perform a measurement on at least        one cell on a second SCC with a deactivated second SCell using        at least a second measurement cycle;    -   determine the effective serving cell interruption probability        (Peff) of missed ACK/NACK signals in an uplink, UL, based on at        least the first measurement cycle and the second measurement        cycle; and    -   adapt a procedure to ensure that when transmitting packets        between a serving cell and the wireless device, a serving cell        interruption probability of missed ACK/NACK in the UL does not        exceed the determined effective serving cell interruption        probability, Peff, of missed ACK/NACK in the UL while performing        the measurements on the cells of the first SCC and the second        SCC.

Embodiment 12

A network node, comprising:

a memory configured to store:

-   -   measurement cycle durations;    -   a serving cell interruption probability, Peff; and    -   a threshold, Pthresh, of the serving cell interruption        probability;

a processor configured to:

-   -   to determine the threshold, Pthresh, of the serving cell        interruption probability, Peff, of missed ACK/NACK in an uplink        signal allowed by a wireless device when measuring in cells of        at least two secondary component carriers, SCC, with deactivated        secondary cells, SCells, using respective measurement cycles;        and    -   adapt at least one measurement cycle based on at least one        pre-defined rule, the at least one measurement cycle being a        duration in which the wireless device performs measurements on        at least one cell of at least two SCCs, such that a serving cell        interruption probability of missed ACK/NACK in the uplink signal        caused by the wireless device remains below the determined        threshold, Pthresh

Embodiments can be realized in hardware, or a combination of hardwareand software. Any kind of computing system, or other apparatus adaptedfor carrying out the methods described herein, is suited to perform thefunctions described herein. A typical combination of hardware andsoftware could be a specialized computer system, having one or moreprocessing elements and a computer program stored on a storage mediumthat, when loaded and executed, controls the computer system such thatit carries out the methods described herein. Embodiments can also beembedded in a computer program product, which comprises all the featuresenabling the implementation of the methods described herein, and which,when loaded in a computing system is able to carry out these methods.Storage medium refers to any volatile or non-volatile storage device.

Computer program or application in the present context means anyexpression, in any language, code or notation, of a set of instructionsintended to cause a system having an information processing capabilityto perform a particular function either directly or after either or bothof the following a) conversion to another language, code or notation; b)reproduction in a different material form.

It will be appreciated by persons skilled in the art that the presentinvention is not limited to what has been particularly shown anddescribed herein above. In addition, unless mention was made above tothe contrary, it should be noted that all of the accompanying drawingsare not to scale. A variety of modifications and variations are possiblein light of the above teachings without departing from the scope andspirit of the invention, which is limited only by the following claims.

1. A method for a wireless device served by a first network node on aprimary cell, PCell, the wireless device being capable of using at leasttwo secondary serving cells, SCells, the method comprising: receiving afirst request to perform a measurement on at least one cell on a firstsecondary component carrier, SCC, with a deactivated first SCell usingat least a first measurement cycle; receiving a second request toperform a measurement on at least one cell on a second SCC with adeactivated second SCell using at least a second measurement cycle;determining an effective serving cell interruption probability, Peff, ofmissed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, directionbased on at least the first measurement cycle and the second measurementcycle; and ensuring that when transmitting packets between a servingcell and the wireless device, a serving cell interruption probability ofa missed at least one of ACK and NACK signaling in the UL direction doesnot exceed the determined effective serving cell interruptionprobability, Peff, of a missed at least one of ACK and NACK signaling inthe UL direction while performing the measurements on the cells of thefirst SCC and the second SCC.
 2. The method of claim 1, wherein theensuring that the serving cell interruption probability of missed atleast one of ACK and NACK signaling in the UL direction does not exceedthe determined effective serving cell interruption probability, Peff, ofmissed at least one of ACK and NACK signaling includes adapting at leastone radio procedure to be performed by the wireless device.
 3. Themethod of claim 2, wherein the adapting of at least one radio procedureincludes modifying a measurement sampling of measurements performed onthe cells by performing the measurements using first and secondmeasurement cycles during a same time period.
 4. The method of claim 2,wherein the adapting of at least one radio procedure includes modifyinga measurement sampling of measurements performed on the cells byperforming the measurements according to only an effective measurementcycle, Ceff, the Ceff being based on the first measurement cycle and thesecond measurement cycle.
 5. The method of claim 2, wherein the adaptingof at least one radio procedure includes modifying a measurementsampling of measurements performed on the cells by performing themeasurements according to an effective measurement cycle, Ceff, theeffective measurement cycle, Ceff, being one of a minimum and maximumperiodicity of the first measurement cycle and the second measurementcycle.
 6. The method of claim 5, wherein the measurements according tothe effective measurement cycle, Ceff, are performed such thatmeasurements on the first SCC are performed one of just before,simultaneously with and just after measurements on the second SCC. 7.The method of claim 2, wherein the adapting of at least one radioprocedure includes at least one of modifying measurement reporting,modifying UL transmission configuration in time and dropping at leastone UL transmission.
 8. The method of claim 1, wherein determining theserving cell interruption probability, Peff, includes determining aneffective measurement cycle periodicity, Ceff, the Ceff being based onthe first measurement cycle and the second measurement cycle; and theserving cell interruption probability, Peff, being determined based onthe effective measurement cycle periodicity, Ceff.
 9. The method ofclaim 8, wherein the effective measurement cycle periodicity, Ceff, isbased on at least one of a minimum function and maximum function appliedto a periodicity of the first measurement cycle and a periodicity of thesecond measurement cycle.
 10. The method of claim 1, wherein determiningthe serving cell interruption probability, Peff, includes: determiningan effective measurement cycle periodicity, Ceff, the Ceff being basedon the first measurement cycle and the second measurement cycle; andmapping the effective measurement cycle periodicity, Ceff, to theeffective cell interruption probability, Peff.
 11. The method of claim1, wherein the first measurement cycle is used by the wireless devicefor performing one of mobility measurements and positioning measurementson the first SCC; and the second measurement cycle is used by thewireless device for performing one of mobility measurements andpositioning measurements.
 12. The method of claim 1, wherein the servingcell is one of the PCell and at least one activated SCell.
 13. Themethod of the claim 1, wherein the wireless device is served by only thePCell and is one of configured and reconfigured with only the first SCC,the method further comprising: determining a second effective servingcell interruption probability, Peff2, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inan uplink, UL, direction based on the first measurement cycle; andensuring that when transmitting packets between a serving cell and thewireless device, a serving cell interruption probability of a missed atleast one of ACK and NACK signaling in the UL direction does not exceedthe determined second effective serving cell interruption probability,Peff2, of a missed at least one of ACK and NACK signaling in the ULdirection while performing the measurements on the cells of the firstSCC.
 14. The method of claim 13, wherein the first measurement cycle andthe second measurement cycles are any of: first SCell measurement cycleand a second SCell measurement cycle used by the wireless device forperforming mobility measurements; and a first Positioning ReferenceSignal, PRS, configuration periodicity and a second PRS configurationperiodicity used by the wireless device for performing positioningmeasurements.
 15. A wireless device served by a first network node on aprimary cell, PCell, the wireless device being capable of using at leasttwo secondary serving cells, SCells, the wireless device comprising: areceiver configured to: receive a first request to perform a measurementon at least one cell on a first secondary component carrier, SCC, with adeactivated first SCell using at least a first measurement cycle;receive a second request to perform a measurement on at least one cellon a second SCC with a deactivated second SCell using at least a secondmeasurement cycle; a processor; a memory configured to store computerinstructions that, when executed by the processor, cause the processorto: determine an effective serving cell interruption probability, Peff,of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink, UL, directionbased on at least the first measurement cycle and the second measurementcycle; and ensure that when transmitting packets between a serving celland the wireless device, a serving cell interruption probability ofmissed at least one of ACK and NACK signaling in the UL direction doesnot exceed the determined effective serving cell interruptionprobability, Peff, of missed at least one of ACK and NACK signaling inthe UL direction while performing the measurements on the cells of thefirst SCC and the second SCC.
 16. The wireless device of claim 15,further comprising a memory configured to store measurement cycledurations and the effective serving cell interruption probability. 17.The wireless device of claim 15, wherein the ensuring that the servingcell interruption probability of missed at least one of ACK and NACKsignaling in the UL direction does not exceed the determined effectiveserving cell interruption probability, Peff, of missed at least one ofACK and NACK signaling includes adapting at least one radio procedureperformed by the wireless device.
 18. The wireless device of claim 17,wherein the adapting of at least one radio procedure includes modifyinga measurement sampling of measurements performed on the cells byperforming the measurements using first and second measurement cyclesduring a same time period.
 19. The wireless device of claim 17, whereinthe adapting of at least one radio procedure includes modifying ameasurement sampling of measurements performed on the cells byperforming the measurements according to only an effective measurementcycle, Ceff, the Ceff being based on the first measurement cycle and thesecond measurement cycle.
 20. The wireless device of claim 17, whereinthe adapting of at least one radio procedure includes modifying ameasurement sampling of measurements performed on the cells byperforming the measurements according to an effective measurement cycle,Ceff, the effective measurement cycle, Ceff, being one of a minimum andmaximum periodicity of the first measurement cycle and the secondmeasurement cycle.
 21. The wireless device of claim 20, wherein themeasurements according to the effective measurement cycle, Ceff, areperformed such that measurements on the first SCC are performed one ofjust before, simultaneously with and just after measurements on thesecond SCC.
 22. The wireless device of claim 17, wherein the adapting ofat least one radio procedure includes at least one of modifyingmeasurement reporting, modifying UL transmission configuration in timeand dropping at least one UL transmission.
 23. The wireless device ofclaim 15, wherein determining the serving cell interruption probability,Peff, includes determining an effective measurement cycle periodicity,Ceff, the Ceff being based on the first measurement cycle and the secondmeasurement cycle; and the serving cell interruption probability, Peff,being determined based on the effective measurement cycle periodicity,Ceff.
 24. The wireless device of claim 23, wherein the effectivemeasurement cycle periodicity, Ceff, is based on at least one of aminimum function and maximum function applied to a periodicity of thefirst measurement cycle and a periodicity of the second measurementcycle.
 25. The wireless device of claim 15, wherein determining theserving cell interruption probability, Peff, includes: determining aneffective measurement cycle periodicity, Ceff, the Ceff being based onthe first measurement cycle and the second measurement cycle; andmapping the effective measurement cycle periodicity, Ceff, to theeffective cell interruption probability, Peff.
 26. The wireless deviceof claim 15, wherein the first measurement cycle is used by the wirelessdevice for performing one of mobility measurements and positioningmeasurements on the first SCC; and the second measurement cycle performsone of mobility measurements and positioning measurements.
 27. Thewireless device of claim 15, wherein the serving cell is one of thePCell and at least one activated SCell.
 28. A method in a network node,the method comprising: determining a threshold of a serving cellinterruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inan uplink direction allowed by a wireless device when measuring in cellsof at least two secondary component carriers, SCCs, with deactivatedsecondary cells, SCells, using respective measurement cycles; andensuring the serving cell interruption probability, Peff, of missed atleast one of Acknowledgement, ACK, and Negative-Acknowledgement, NACK,signaling in the uplink channel is below the threshold, the at least onemeasurement cycle being a period with which the wireless device performsmeasurements on at least one cell of at least two SCCs.
 29. The methodof claim 28, wherein the ensuring that the serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in the uplink direction isbelow the threshold includes modifying at least one parameter associatedwith at least one measurement cycle.
 30. The method of claim 28, whereinthe at least one parameter includes at least one of a periodicity of themeasurement cycle and a time offset of the measurement cycle.
 31. Themethod of claim 29, further comprising: determining an effectivemeasurement cycle, Ceff, based on the measurement cycles; determining aserving cell interruption probability, Peff, based on the effectivemeasurement cycle, Ceff; and the modifying of the at least onemeasurement cycle being based on the determined serving cellinterruption probability, Peff.
 32. The method of claim 31, wherein theeffective measurement cycle periodicity, Ceff, is based on at least oneof a minimum function and maximum function applied to the measurementcycles.
 33. The method of claim 31, wherein the determining of theserving cell probability, Peff, includes mapping the effectivemeasurement cycle periodicity, Ceff, to a predefined serving cellinterruption probability, Peff.
 34. The method of claim 38, wherein theat least one measurement cycle is any of: a SCell measurement cycle usedby the wireless device for performing mobility measurements; and a PRSconfiguration periodicity used by the wireless device for performingpositioning measurements.
 35. A network node, the network nodecomprising: a processor; a memory configured to store: measurement cycledurations; a serving cell interruption probability, Peff; and athreshold, Pthresh, of the serving cell interruption probability; andcomputer instructions that, when executed by the processor, cause theprocessor to: determine a threshold of a serving cell interruptionprobability, Peff, of missed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in an uplink direction allowedby a wireless device when measuring in cells of at least two secondarycomponent carriers, SCCs, with deactivated secondary cells, SCells,using respective measurement cycles; and ensure the serving cellinterruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inthe uplink channel is below the threshold, the at least one measurementcycle being a duration in which the wireless device performsmeasurements on at least one cell of at least two SCCs.
 36. The networknode of claim 35, wherein the ensuring that the serving cellinterruption probability, Peff, of missed at least one ofAcknowledgement, ACK, and Negative-Acknowledgement, NACK, signaling inthe uplink direction is below the threshold includes modifying at leastone measurement cycle.
 37. The network node of claim 36, wherein thememory is further configured to store additional computer instructionsthat, when executed by the processor, cause the processor to: determinean effective measurement cycle, Ceff, based on the measurement cycles;determine a serving cell interruption probability, Peff, based on theeffective measurement cycle, Ceff; and the modifying of the at least onemeasurement cycle being based on the determined serving cellinterruption probability, Peff.
 38. The network node of claim 37,wherein the effective measurement cycle periodicity, Ceff, is based onat least one of a minimum function and maximum function applied to themeasurement cycles.
 39. The network node of claim 37, wherein thedetermining of the serving cell probability, Peff, includes mapping theeffective measurement cycle periodicity, Ceff, to a predefined servingcell interruption probability, Peff.
 40. A network node, comprising ameasurement configuration module configured to: determine a threshold,Pthresh, of a serving cell interruption probability, Peff, of missed atleast one of Acknowledgement, ACK, and Negative-Acknowledgement, NACK,signaling in an uplink signal allowed by a wireless device whenmeasuring in cells of at least two secondary component carriers, SCC,with deactivated secondary cells, SCells, using respective measurementcycles; and adapt at least one measurement cycle based on at least onepredefined rule, the at least one measurement cycle being a duration inwhich the wireless device performs measurements on at least one cell ofat least two SCCs, such that a serving cell interruption probability ofmissed at least one of Acknowledgement, ACK, andNegative-Acknowledgement, NACK, signaling in the uplink signal caused bythe wireless device remains below the determined threshold, Pthresh. 41.A wireless device, served by a first network node on a primary cell,PCell, the wireless device being capable of using at least two secondaryserving cells, SCells, the wireless device comprising: a receiver moduleconfigured to: receive a first request to perform a measurement on atleast one cell on a first secondary component carrier, SCC, with adeactivated first SCell using at least a first measurement cycle; andreceive a second request to perform a measurement on at least one cellon a second SCC with a deactivated second SCell using at least a secondmeasurement cycle; an adapter module configured to: determine aneffective serving cell interruption probability, Peff, of missed atleast one of Acknowledgement, ACK, and Negative-Acknowledgement, NACK,signaling in an uplink, UL, direction based on at least the firstmeasurement cycle and the second measurement cycle; and ensure that whentransmitting packets between a serving cell and the wireless device, aserving cell interruption probability of missed at least one of ACK andNACK signaling in the UL direction does not exceed the determinedeffective serving cell interruption probability, Peff, of missed atleast one of ACK and NACK signaling in the UL direction while performingthe measurements on the cells of the first SCC and the second SCC.